8564664 has 32 divisors (see below), whose sum is σ = 21557520. Its totient is φ = 2835456.

The previous prime is 8564653. The next prime is 8564681. The reversal of 8564664 is 4664658.

8564664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2632 + ... + 4904.

Almost surely, 2^8564664 is an apocalyptic number.

It is an amenable number.

8564664 is an abundant number, since it is smaller than the sum of its proper divisors (12992856).

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

8564664 is a wasteful number, since it uses less digits than its factorization.

8564664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2435 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 8564664 is about 2926.5447203144. The cubic root of 8564664 is about 204.5989701141.

The spelling of 8564664 in words is "eight million, five hundred sixty-four thousand, six hundred sixty-four".