8565608664 has 96 divisors (see below), whose sum is σ = 25042024800. Its totient is φ = 2636874240.

The previous prime is 8565608663. The next prime is 8565608719. The reversal of 8565608664 is 4668065658.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8565608664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8565608663) 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, 41157 + ... + 137204.

It is an arithmetic number, because the mean of its divisors is an integer number (260854425).

Almost surely, 2^8565608664 is an apocalyptic number.

It is an amenable number.

8565608664 is an abundant number, since it is smaller than the sum of its proper divisors (16476416136).

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

8565608664 is a wasteful number, since it uses less digits than its factorization.

8565608664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178425 (or 178418 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The square root of 8565608664 is about 92550.5735476556. The cubic root of 8565608664 is about 2046.0649211289.

The spelling of 8565608664 in words is "eight billion, five hundred sixty-five million, six hundred eight thousand, six hundred sixty-four".