64566375 has 32 divisors (see below), whose sum is σ = 108186624. Its totient is φ = 34196000.

The previous prime is 64566343. The next prime is 64566377. The reversal of 64566375 is 57366546.

It is not a de Polignac number, because 64566375 - 2⁵ = 64566343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64566377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62110 + ... + 63140.

It is an arithmetic number, because the mean of its divisors is an integer number (3380832).

Almost surely, 2^64566375 is an apocalyptic number.

64566375 is a deficient number, since it is larger than the sum of its proper divisors (43620249).

64566375 is a wasteful number, since it uses less digits than its factorization.

64566375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1206 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 64566375 is about 8035.3204665402. The cubic root of 64566375 is about 401.1764842363.

The spelling of 64566375 in words is "sixty-four million, five hundred sixty-six thousand, three hundred seventy-five".