663753920 has 56 divisors (see below), whose sum is σ = 1619146368. Its totient is φ = 259020800.

The previous prime is 663753913. The next prime is 663753947. The reversal of 663753920 is 29357366.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12176 + ... + 38415.

It is an arithmetic number, because the mean of its divisors is an integer number (28913328).

Almost surely, 2^663753920 is an apocalyptic number.

It is an amenable number.

663753920 is an abundant number, since it is smaller than the sum of its proper divisors (955392448).

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

663753920 is a wasteful number, since it uses less digits than its factorization.

663753920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50649 (or 50639 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 41.

The square root of 663753920 is about 25763.4221329388. The cubic root of 663753920 is about 872.3063480478.

The spelling of 663753920 in words is "six hundred sixty-three million, seven hundred fifty-three thousand, nine hundred twenty".