68666856 has 16 divisors (see below), whose sum is σ = 171667200. Its totient is φ = 22888944.

The previous prime is 68666849. The next prime is 68666903. The reversal of 68666856 is 65866686.

It is a super-2 number, since 2×68666856² = 9430274225849472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68666799 and 68666808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430536 + ... + 1430583.

It is an arithmetic number, because the mean of its divisors is an integer number (10729200).

Almost surely, 2^68666856 is an apocalyptic number.

It is an amenable number.

68666856 is an abundant number, since it is smaller than the sum of its proper divisors (103000344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68666856 is a wasteful number, since it uses less digits than its factorization.

68666856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861128 (or 2861124 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 68666856 is about 8286.5466872516. The cubic root of 68666856 is about 409.4954252941.

The spelling of 68666856 in words is "sixty-eight million, six hundred sixty-six thousand, eight hundred fifty-six".