56566660 has 24 divisors (see below), whose sum is σ = 123955776. Its totient is φ = 21642720.

The previous prime is 56566621. The next prime is 56566669. The reversal of 56566660 is 6666565.

It is a happy number.

56566660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (56566669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61026 + ... + 61945.

It is an arithmetic number, because the mean of its divisors is an integer number (5164824).

Almost surely, 2^56566660 is an apocalyptic number.

It is an amenable number.

56566660 is an abundant number, since it is smaller than the sum of its proper divisors (67389116).

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

56566660 is a wasteful number, since it uses less digits than its factorization.

56566660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123003 (or 123001 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 56566660 is about 7521.0810393187. The cubic root of 56566660 is about 383.8723624549.

The spelling of 56566660 in words is "fifty-six million, five hundred sixty-six thousand, six hundred sixty".