168 (one hundred [and] sixty-eight) is the natural number following 167 and preceding 169.
168 is a Dedekind number, and an idoneal numbers, and a Cunningham number.
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 .
Some Chinese consider 168 a lucky number, because ä¸Âå Âå « ("168") Mandarin is roughly homophonous with the phrase "ä¸Âè·¯ç¼" Mandarin which means "fortune all the way", or, as the United States Mint claims, "Prosperity Forever".