56660751 has 24 divisors (see below), whose sum is σ = 96763680. Its totient is φ = 31260096.

The previous prime is 56660743. The next prime is 56660759. The reversal of 56660751 is 15706665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56660743) and next prime (56660759).

It is not a de Polignac number, because 56660751 - 2³ = 56660743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56660759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13680 + ... + 17333.

It is an arithmetic number, because the mean of its divisors is an integer number (4031820).

Almost surely, 2^56660751 is an apocalyptic number.

56660751 is a deficient number, since it is larger than the sum of its proper divisors (40102929).

56660751 is a wasteful number, since it uses less digits than its factorization.

56660751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31055 (or 31052 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 56660751 is about 7527.3335916512. Note that the first 3 decimals coincide. The cubic root of 56660751 is about 384.0850844989.

The spelling of 56660751 in words is "fifty-six million, six hundred sixty thousand, seven hundred fifty-one".