168 (number)
Natural number
From Wikipedia, the free encyclopedia
168 (one hundred [and] sixty-eight) is the natural number following 167 and preceding 169.
(one hundred sixty-eighth)
| ||||
|---|---|---|---|---|
| Cardinal | one hundred sixty-eight | |||
| Ordinal | 168th (one hundred sixty-eighth) | |||
| Factorization | 23 Ã 3 Ã 7 | |||
| Divisors | 1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168 | |||
| Greek numeral | ΡÎδ | |||
| Roman numeral | CLXVIII, clxviii | |||
| Binary | 101010002 | |||
| Ternary | 200203 | |||
| Senary | 4406 | |||
| Octal | 2508 | |||
| Duodecimal | 12012 | |||
| Hexadecimal | A816 | |||
Mathematics
168 is a Dedekind number,[1] and an idoneal numbers, and a Cunningham number.[2]
Abstract algebra
168 is the order of the second smallest nonabelian simple group From Hurwitz's automorphisms theorem, 168 is the maximum possible number of automorphisms of a genus 3 Riemann surface, this maximum being achieved by the Klein quartic, whose symmetry group is .[3]
In other fields
Numerology
Some Chinese consider 168 a lucky number, because ä¸å å « ("168") Mandarin pinyin: yÄ«liùbÄ is roughly homophonous with the phrase "ä¸è·¯ç¼" Mandarin pinyin: yÄ«lùfÄ which means "fortune all the way", or, as the United States Mint claims, "Prosperity Forever".[4]
