64515966 has 16 divisors (see below), whose sum is σ = 134642304. Its totient is φ = 20570264.

The previous prime is 64515917. The next prime is 64515973. The reversal of 64515966 is 66951546.

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, 233616 + ... + 233891.

It is an arithmetic number, because the mean of its divisors is an integer number (8415144).

Almost surely, 2^64515966 is an apocalyptic number.

64515966 is an abundant number, since it is smaller than the sum of its proper divisors (70126338).

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

64515966 is a wasteful number, since it uses less digits than its factorization.

64515966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467535.

The product of its digits is 194400, while the sum is 42.

The square root of 64515966 is about 8032.1831403424. The cubic root of 64515966 is about 401.0720533538.

The spelling of 64515966 in words is "sixty-four million, five hundred fifteen thousand, nine hundred sixty-six".