656566155556 has 12 divisors (see below), whose sum is σ = 1150588817280. Its totient is φ = 327826493480.

The previous prime is 656566155529. The next prime is 656566155587. The reversal of 656566155556 is 655551665656.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 656566155494 and 656566155503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114142840 + ... + 114148591.

It is an arithmetic number, because the mean of its divisors is an integer number (95882401440).

Almost surely, 2^656566155556 is an apocalyptic number.

It is an amenable number.

656566155556 is a deficient number, since it is larger than the sum of its proper divisors (494022661724).

656566155556 is a wasteful number, since it uses less digits than its factorization.

656566155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228292154 (or 228292152 counting only the distinct ones).

The product of its digits is 121500000, while the sum is 61.

The spelling of 656566155556 in words is "six hundred fifty-six billion, five hundred sixty-six million, one hundred fifty-five thousand, five hundred fifty-six".