664335375 has 56 divisors (see below), whose sum is σ = 1215999408. Its totient is φ = 322102000.

The previous prime is 664335359. The next prime is 664335389. The reversal of 664335375 is 573533466.

664335375 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an ABA number since it can be written as A⋅B^A, here for A=3, B=605.

It is not a de Polignac number, because 664335375 - 2⁴ = 664335359 is a prime.

Its product of digits (680400) is a multiple of the sum of its prime factors (84).

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 60394120 + ... + 60394130.

Almost surely, 2^664335375 is an apocalyptic number.

664335375 is a deficient number, since it is larger than the sum of its proper divisors (551664033).

664335375 is an frugal number, since it uses more digits than its factorization.

664335375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 19 counting only the distinct ones).

The product of its digits is 680400, while the sum is 42.

The square root of 664335375 is about 25774.7041690104. The cubic root of 664335375 is about 872.5609900360.

The spelling of 664335375 in words is "six hundred sixty-four million, three hundred thirty-five thousand, three hundred seventy-five".