56666730 has 32 divisors (see below), whose sum is σ = 136718784. Its totient is φ = 15031296.

The previous prime is 56666723. The next prime is 56666773. The reversal of 56666730 is 3766665.

It is a super-2 number, since 2×56666730² = 6422236577785800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (4272462).

Almost surely, 2^56666730 is an apocalyptic number.

56666730 is an abundant number, since it is smaller than the sum of its proper divisors (80052054).

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

56666730 is a wasteful number, since it uses less digits than its factorization.

56666730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990.

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 56666730 is about 7527.7307337603. The cubic root of 56666730 is about 384.0985939325.

The spelling of 56666730 in words is "fifty-six million, six hundred sixty-six thousand, seven hundred thirty".