8564436660 has 72 divisors (see below), whose sum is σ = 25966997280. Its totient is φ = 2108166528.

The previous prime is 8564436611. The next prime is 8564436667. The reversal of 8564436660 is 666344658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8564436667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412170 + ... + 432449.

It is an arithmetic number, because the mean of its divisors is an integer number (360652740).

Almost surely, 2^8564436660 is an apocalyptic number.

It is an amenable number.

8564436660 is an abundant number, since it is smaller than the sum of its proper divisors (17402560620).

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

8564436660 is a wasteful number, since it uses less digits than its factorization.

8564436660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844657 (or 844642 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The square root of 8564436660 is about 92544.2416360953. The cubic root of 8564436660 is about 2045.9715980994.

The spelling of 8564436660 in words is "eight billion, five hundred sixty-four million, four hundred thirty-six thousand, six hundred sixty".