56665580 has 12 divisors (see below), whose sum is σ = 118997760. Its totient is φ = 22666224.

The previous prime is 56665579. The next prime is 56665591. The reversal of 56665580 is 8556665.

56665580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1416620 + ... + 1416659.

It is an arithmetic number, because the mean of its divisors is an integer number (9916480).

Almost surely, 2^56665580 is an apocalyptic number.

It is an amenable number.

56665580 is an abundant number, since it is smaller than the sum of its proper divisors (62332180).

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

56665580 is a wasteful number, since it uses less digits than its factorization.

56665580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833288 (or 2833286 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The square root of 56665580 is about 7527.6543491316. The cubic root of 56665580 is about 384.0959956038.

The spelling of 56665580 in words is "fifty-six million, six hundred sixty-five thousand, five hundred eighty".