663939320 has 32 divisors (see below), whose sum is σ = 1629670320. Its totient is φ = 241432320.

The previous prime is 663939319. The next prime is 663939323. The reversal of 663939320 is 23939366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663939323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754037 + ... + 754916.

Almost surely, 2^663939320 is an apocalyptic number.

It is an amenable number.

663939320 is an abundant number, since it is smaller than the sum of its proper divisors (965731000).

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

663939320 is a wasteful number, since it uses less digits than its factorization.

663939320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508975 (or 1508971 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 41.

The square root of 663939320 is about 25767.0200062017. The cubic root of 663939320 is about 872.3875581352.

The spelling of 663939320 in words is "six hundred sixty-three million, nine hundred thirty-nine thousand, three hundred twenty".