6886660656 has 40 divisors (see below), whose sum is σ = 18726886720. Its totient is φ = 2174734656.

The previous prime is 6886660639. The next prime is 6886660673. The reversal of 6886660656 is 6560666886.

It is an interprime number because it is at equal distance from previous prime (6886660639) and next prime (6886660673).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 6886660596 and 6886660605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3774670 + ... + 3776493.

It is an arithmetic number, because the mean of its divisors is an integer number (468172168).

Almost surely, 2^6886660656 is an apocalyptic number.

It is an amenable number.

6886660656 is an abundant number, since it is smaller than the sum of its proper divisors (11840226064).

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

6886660656 is a wasteful number, since it uses less digits than its factorization.

6886660656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551193 (or 7551187 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The square root of 6886660656 is about 82985.9063696963. The cubic root of 6886660656 is about 1902.5506515432.

The spelling of 6886660656 in words is "six billion, eight hundred eighty-six million, six hundred sixty thousand, six hundred fifty-six".