56566661000 has 64 divisors (see below), whose sum is σ = 136635932160. Its totient is φ = 21896760000.

The previous prime is 56566660879. The next prime is 56566661003. The reversal of 56566661000 is 16666565.

It is not an unprimeable number, because it can be changed into a prime (56566661003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 881366 + ... + 943365.

It is an arithmetic number, because the mean of its divisors is an integer number (2134936440).

Almost surely, 2^56566661000 is an apocalyptic number.

56566661000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56566661000 is an abundant number, since it is smaller than the sum of its proper divisors (80069271160).

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

56566661000 is a wasteful number, since it uses less digits than its factorization.

56566661000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824783 (or 1824769 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 56566661000 in words is "fifty-six billion, five hundred sixty-six million, six hundred sixty-one thousand".