56715660 has 96 divisors (see below), whose sum is σ = 178053120. Its totient is φ = 14986944.

The previous prime is 56715653. The next prime is 56715661. The reversal of 56715660 is 6651765.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (56715661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68167 + ... + 68993.

It is an arithmetic number, because the mean of its divisors is an integer number (1854720).

Almost surely, 2^56715660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56715660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89026560).

56715660 is an abundant number, since it is smaller than the sum of its proper divisors (121337460).

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

56715660 is a wasteful number, since it uses less digits than its factorization.

56715660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 964 counting only the distinct ones).

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

The square root of 56715660 is about 7530.9800159076. The cubic root of 56715660 is about 384.2091146175.

It can be divided in two parts, 56715 and 660, that added together give a palindrome (57375).

The spelling of 56715660 in words is "fifty-six million, seven hundred fifteen thousand, six hundred sixty".