668792575 has 24 divisors (see below), whose sum is σ = 929159280. Its totient is φ = 473241600.

The previous prime is 668792567. The next prime is 668792581. The reversal of 668792575 is 575297866.

It is not a de Polignac number, because 668792575 - 2³ = 668792567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22690 + ... + 43039.

It is an arithmetic number, because the mean of its divisors is an integer number (38714970).

Almost surely, 2^668792575 is an apocalyptic number.

668792575 is a deficient number, since it is larger than the sum of its proper divisors (260366705).

668792575 is a wasteful number, since it uses less digits than its factorization.

668792575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65787 (or 65782 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 55.

The square root of 668792575 is about 25861.0242449908. The cubic root of 668792575 is about 874.5080554424.

The spelling of 668792575 in words is "six hundred sixty-eight million, seven hundred ninety-two thousand, five hundred seventy-five".