168

168 is the number following 167 and preceding 169.
== Properties ==
* 168 is an .MathWorld, Idoneal Number
* 168 is the largest known number, such that 2n doesn’t .
* 168 is also the of the , which is isomorphic to GL(3,2).
* 168 is the sum of the first four Mersenne primes: 3 + 7 + 31 + 127 = 168, and the product of the first two s: 6 × 28 = 168.
* 168 is equal to 12!!!!!.
== Cultural significance ==
* 168 is the number of hours in a week.
== In games ==
* 168 is the number of in a double-six set.
* 168 is also the number of possible king moves in starchess.
== Sources ==
Category:Numbers
Category:Chess
Category:Class 1
Category:Domino-related numbers
Category:Even numbers
Category:Non-powers
Category:Numbers in group theory
Category:Numbers in metrology
Category:Numbers with 3 digits
Category:Unnamed numbers with googological uses