663091875 has 30 divisors (see below), whose sum is σ = 1196876252. Its totient is φ = 353646000.

The previous prime is 663091859. The next prime is 663091901. The reversal of 663091875 is 578190366.

It is a happy number.

663091875 is a `hidden beast` number, since 6 + 630 + 9 + 1 + 8 + 7 + 5 = 666.

It is not a de Polignac number, because 663091875 - 2⁴ = 663091859 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663091875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 53317 + ... + 64566.

Almost surely, 2^663091875 is an apocalyptic number.

663091875 is a deficient number, since it is larger than the sum of its proper divisors (533784377).

663091875 is a wasteful number, since it uses less digits than its factorization.

663091875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117909 (or 117891 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 663091875 is about 25750.5703820323. The cubic root of 663091875 is about 872.0162314089.

The spelling of 663091875 in words is "six hundred sixty-three million, ninety-one thousand, eight hundred seventy-five".