56659974 has 36 divisors (see below), whose sum is σ = 132122124. Its totient is φ = 16151688.

The previous prime is 56659973. The next prime is 56659979. The reversal of 56659974 is 47995665.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56659973) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 128847 + ... + 129285.

It is an arithmetic number, because the mean of its divisors is an integer number (3670059).

Almost surely, 2^56659974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56659974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66061062).

56659974 is an abundant number, since it is smaller than the sum of its proper divisors (75462150).

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

56659974 is an equidigital number, since it uses as much as digits as its factorization.

56659974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 451 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 51.

The square root of 56659974 is about 7527.2819795727. The cubic root of 56659974 is about 384.0833288129.

The spelling of 56659974 in words is "fifty-six million, six hundred fifty-nine thousand, nine hundred seventy-four".