56661970 has 8 divisors (see below), whose sum is σ = 101991564. Its totient is φ = 22664784.

The previous prime is 56661953. The next prime is 56661973. The reversal of 56661970 is 7916665.

56661970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56655729 + 6241 = 7527^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (56661973) 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 3 ways as a sum of consecutive naturals, for example, 2833089 + ... + 2833108.

Almost surely, 2^56661970 is an apocalyptic number.

56661970 is a deficient number, since it is larger than the sum of its proper divisors (45329594).

56661970 is a wasteful number, since it uses less digits than its factorization.

56661970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666204.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 56661970 is about 7527.4145627832. The cubic root of 56661970 is about 384.0878388827.

The spelling of 56661970 in words is "fifty-six million, six hundred sixty-one thousand, nine hundred seventy".