1056665656 has 64 divisors (see below), whose sum is σ = 2073444480. Its totient is φ = 504483840.

The previous prime is 1056665591. The next prime is 1056665693. The reversal of 1056665656 is 6565666501.

It is a super-2 number, since 2×1056665656² = 2233084617139820672, which 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 15 ways as a sum of consecutive naturals, for example, 3760236 + ... + 3760516.

It is an arithmetic number, because the mean of its divisors is an integer number (32397570).

Almost surely, 2^1056665656 is an apocalyptic number.

It is an amenable number.

1056665656 is a deficient number, since it is larger than the sum of its proper divisors (1016778824).

1056665656 is a wasteful number, since it uses less digits than its factorization.

1056665656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 1056665656 is about 32506.3940787040. The cubic root of 1056665656 is about 1018.5425988723.

The spelling of 1056665656 in words is "one billion, fifty-six million, six hundred sixty-five thousand, six hundred fifty-six".