64690575 has 12 divisors (see below), whose sum is σ = 106955208. Its totient is φ = 34501600.

The previous prime is 64690547. The next prime is 64690597. The reversal of 64690575 is 57509646.

It is not a de Polignac number, because 64690575 - 2⁵ = 64690543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431196 + ... + 431345.

It is an arithmetic number, because the mean of its divisors is an integer number (8912934).

Almost surely, 2^64690575 is an apocalyptic number.

64690575 is a deficient number, since it is larger than the sum of its proper divisors (42264633).

64690575 is a wasteful number, since it uses less digits than its factorization.

64690575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862554 (or 862549 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 64690575 is about 8043.0451322867. The cubic root of 64690575 is about 401.4335540857.

The spelling of 64690575 in words is "sixty-four million, six hundred ninety thousand, five hundred seventy-five".