663696125 has 16 divisors (see below), whose sum is σ = 871890240. Its totient is φ = 503010000.

The previous prime is 663696113. The next prime is 663696179. The reversal of 663696125 is 521696366.

It is not a de Polignac number, because 663696125 - 2⁸ = 663695869 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 137351 + ... + 142100.

It is an arithmetic number, because the mean of its divisors is an integer number (54493140).

Almost surely, 2^663696125 is an apocalyptic number.

It is an amenable number.

663696125 is a deficient number, since it is larger than the sum of its proper divisors (208194115).

663696125 is a wasteful number, since it uses less digits than its factorization.

663696125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279485 (or 279475 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 663696125 is about 25762.3004601685. The cubic root of 663696125 is about 872.2810292225.

The spelling of 663696125 in words is "six hundred sixty-three million, six hundred ninety-six thousand, one hundred twenty-five".