64686684 has 24 divisors (see below), whose sum is σ = 154618128. Its totient is φ = 21036160.

The previous prime is 64686679. The next prime is 64686707. The reversal of 64686684 is 48668646.

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, 65247 + ... + 66230.

It is an arithmetic number, because the mean of its divisors is an integer number (6442422).

Almost surely, 2^64686684 is an apocalyptic number.

It is an amenable number.

64686684 is an abundant number, since it is smaller than the sum of its proper divisors (89931444).

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

64686684 is a wasteful number, since it uses less digits than its factorization.

64686684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131525 (or 131523 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 48.

The square root of 64686684 is about 8042.8032426512. The cubic root of 64686684 is about 401.4255054672.

The spelling of 64686684 in words is "sixty-four million, six hundred eighty-six thousand, six hundred eighty-four".