66636

Appears in sequences

• Numbers having four 6's in base 10.at n=21A043516
• Numbers n such that n * x/(x-1) produces a rotation of the digits in n for some value of x.at n=38A288669
• Numbers with no 0 digit that are divisible by the sum of any two of their digits at distinct positions.at n=47A308561
• The number of grains of sand in the identity element for the 3D sandpile group on an n X n X n cubic grid.at n=25A351379