56666666665656 has 96 divisors (see below), whose sum is σ = 157196278512000. Its totient is φ = 18435149992512.

The previous prime is 56666666665613. The next prime is 56666666665667. The reversal of 56666666665656 is 65656666666665.

It is a super-2 number, since 2×56666666665656² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47393740 + ... + 48574683.

It is an arithmetic number, because the mean of its divisors is an integer number (1637461234500).

Almost surely, 2^{56666666665656} is an apocalyptic number.

It is an amenable number.

56666666665656 is an abundant number, since it is smaller than the sum of its proper divisors (100529611846344).

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

56666666665656 is a wasteful number, since it uses less digits than its factorization.

56666666665656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95968633 (or 95968626 counting only the distinct ones).

The product of its digits is 45349632000, while the sum is 81.

The spelling of 56666666665656 in words is "fifty-six trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-five thousand, six hundred fifty-six".