664752375 has 144 divisors (see below), whose sum is σ = 1442638080. Its totient is φ = 293328000.

The previous prime is 664752329. The next prime is 664752401. The reversal of 664752375 is 573257466.

It is not a de Polignac number, because 664752375 - 2⁸ = 664752119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664752375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1708681 + ... + 1709069.

It is an arithmetic number, because the mean of its divisors is an integer number (10018320).

Almost surely, 2^664752375 is an apocalyptic number.

664752375 is an abundant number, since it is smaller than the sum of its proper divisors (777885705).

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

664752375 is a wasteful number, since it uses less digits than its factorization.

664752375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 435 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 664752375 is about 25782.7922265995. The cubic root of 664752375 is about 872.7435192436.

The spelling of 664752375 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, three hundred seventy-five".