68556879 has 48 divisors (see below), whose sum is σ = 106928640. Its totient is φ = 42261120.

The previous prime is 68556877. The next prime is 68556907. The reversal of 68556879 is 97865586.

68556879 is a `hidden beast` number, since 6 + 8 + 5 + 568 + 79 = 666.

It is not a de Polignac number, because 68556879 - 2¹ = 68556877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68556871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1023204 + ... + 1023270.

It is an arithmetic number, because the mean of its divisors is an integer number (2227680).

Almost surely, 2^68556879 is an apocalyptic number.

68556879 is a deficient number, since it is larger than the sum of its proper divisors (38371761).

68556879 is a wasteful number, since it uses less digits than its factorization.

68556879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 217 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 68556879 is about 8279.9081516645. The cubic root of 68556879 is about 409.2766921955.

The spelling of 68556879 in words is "sixty-eight million, five hundred fifty-six thousand, eight hundred seventy-nine".