66415264 has 24 divisors (see below), whose sum is σ = 131120640. Its totient is φ = 33114816.

The previous prime is 66415253. The next prime is 66415273. The reversal of 66415264 is 46251466.

It is a zygodrome in base 4.

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, 9547 + ... + 14965.

It is an arithmetic number, because the mean of its divisors is an integer number (5463360).

Almost surely, 2^66415264 is an apocalyptic number.

It is an amenable number.

66415264 is a deficient number, since it is larger than the sum of its proper divisors (64705376).

66415264 is a wasteful number, since it uses less digits than its factorization.

66415264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812 (or 5804 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 66415264 is about 8149.5560615288. The cubic root of 66415264 is about 404.9697970669.

The spelling of 66415264 in words is "sixty-six million, four hundred fifteen thousand, two hundred sixty-four".