56656530 has 128 divisors (see below), whose sum is σ = 178421760. Its totient is φ = 12519360.

The previous prime is 56656507. The next prime is 56656577. The reversal of 56656530 is 3565665.

It is a happy number.

56656530 is a `hidden beast` number, since 5 + 66 + 565 + 30 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58107 + ... + 59073.

It is an arithmetic number, because the mean of its divisors is an integer number (1393920).

Almost surely, 2^56656530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56656530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89210880).

56656530 is an abundant number, since it is smaller than the sum of its proper divisors (121765230).

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

56656530 is a wasteful number, since it uses less digits than its factorization.

56656530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 56656530 is about 7527.0532082615. The cubic root of 56656530 is about 384.0755466597.

The spelling of 56656530 in words is "fifty-six million, six hundred fifty-six thousand, five hundred thirty".