166 (number)

Short description: Natural number

| <- 165  | 166 |  167 ->

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← 160 161 162 163 164 165 166 167 168 169 →

List of numbers — Integers

← 0 100 200 300 400 500 600 700 800 900 →

Cardinal| one hundred sixty-six
Ordinal| 166th
(one hundred sixty-sixth)
Factorization| 2 × 83
Divisors| 1, 2, 83, 166
Greek numeral| ΡΞϚ´
Roman numeral| CLXVI
Binary| 101001102
Ternary| 200113
Quaternary| 22124
Quinary| 11315
Senary| 4346
Octal| 2468
Duodecimal| 11A12
Hexadecimal| A616
Vigesimal| 8620
Base 36| 4M36

166 (one hundred [and] sixty-six) is the natural number following 165 and preceding 167.

## Contents

* 1 In mathematics
* 2 In astronomy
* 3 In the military
* 4 In sports
* 5 In transportation
* 6 In other fields
* 7 See also
* 8 External links
* 9 References

## In mathematics

166 is an even number and a composite number. It is a centered triangular number.[1]

Given 166, the Mertens function returns 0. 166 is a Smith number in base 10.[2]

## In astronomy

* 166 Rhodope is a dark main belt asteroid, in the Adeona family of asteroids
* 166P/NEAT is a periodic comet and centaur in the outer Solar System
* HD 166 is the 6th magnitude star in the constellation Andromeda

## In the military

* 166th Signal Photo Company was the official photo unit in the 89th Division of George Patton's Third Army in World War II
* Convoy ON-166 was the 166th of the numbered ON series of merchant ship convoys outbound from the British Isles to North America departing February 11, 1943
* Marine Medium Helicopter Squadron 166 is a United States Marine Corps helicopter
* USCGC Tamaroa (WMEC-166) was a United States Coast Guard cutter during World War II
* Engineering:USS Alcedo (SP-166) was a United States Navy yacht. She was the first American vessel lost in World War I
* Engineering:USS Baron (DE-166) was a United States Navy Cannon-class destroyer escort during World War II
* Engineering:USS Bush (DD-166) was a United States Navy Wickes-class destroyer during the World War I
* Engineering:USS Cabell (AK-166) was a United States Navy Alamosa-class cargo ship during World War II
* Engineering:USS Fond du Lac (APA-166) was a United States Navy Haskell-class attack transport ship during World War II
* USS Jamestown (AGTR-3/AG-166) was a United States Navy Oxford-class technical research ship following World War II

## In sports

* Sam Thompson’s 166 RBIs in 1887 stood as a Major League Baseball record until Babe Ruth broke the record in 1921

## In transportation

* British Rail Class 166
* The now-defunct elevated IRT Third Avenue Line, 166th Street station in the Bronx, New York
* London Buses route 166
* Piaggio P.166 is a twin-engined push prop-driven utility aircraft developed by the Italian aircraft manufacturer Piaggio
* Banat Air Flight 166 crashed on take-off en route from Romania on December 13, 1995
* Alfa Romeo 166 produced from 1998 to 2007
* Ferrari 166 model cars produced from 1948 to 1953
* Ferrari 166 Inter (1949) Coachbuilt street coupe and cabriolet

## In other fields

166 is also:

* The year AD 166 or 166 BC
* The atomic number of an element temporarily called Unhexhexium

## See also

* List of highways numbered 166
* United States Supreme Court cases, Volume 166
* United Nations Security Council Resolution 166

## External links

* Number Facts and Trivia: 166
* The Number 166
* VirtueScience: 166
* 166th Street (3rd Avenue El)

## References

1. ↑ "Sloane's A005448 : Centered triangular numbers". OEIS Foundation. https://oeis.org/A005448.
2. ↑ "Sloane's A006753 : Smith numbers". OEIS Foundation. https://oeis.org/A006753.

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