65572864 has 52 divisors (see below), whose sum is σ = 149928064. Its totient is φ = 28090368.

The previous prime is 65572853. The next prime is 65572877. The reversal of 65572864 is 46827556.

It is a self number, because there is not a number n which added to its sum of digits gives 65572864.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27529 + ... + 29815.

It is an arithmetic number, because the mean of its divisors is an integer number (2883232).

Almost surely, 2^65572864 is an apocalyptic number.

65572864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65572864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74964032).

65572864 is an abundant number, since it is smaller than the sum of its proper divisors (84355200).

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

65572864 is an equidigital number, since it uses as much as digits as its factorization.

65572864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2296 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 65572864 is about 8097.7073298558. The cubic root of 65572864 is about 403.2503170597.

The spelling of 65572864 in words is "sixty-five million, five hundred seventy-two thousand, eight hundred sixty-four".