56565660 has 144 divisors (see below), whose sum is σ = 175593600. Its totient is φ = 13563648.

The previous prime is 56565617. The next prime is 56565667. The reversal of 56565660 is 6656565.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56565667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 958711 + ... + 958769.

It is an arithmetic number, because the mean of its divisors is an integer number (1219400).

Almost surely, 2^56565660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56565660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87796800).

56565660 is an abundant number, since it is smaller than the sum of its proper divisors (119027940).

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

56565660 is a wasteful number, since it uses less digits than its factorization.

56565660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 56565660 is about 7521.0145592201. The cubic root of 56565660 is about 383.8701003767.

The spelling of 56565660 in words is "fifty-six million, five hundred sixty-five thousand, six hundred sixty".