663594680 has 128 divisors (see below), whose sum is σ = 1783296000. Its totient is φ = 217451520.

The previous prime is 663594671. The next prime is 663594683. The reversal of 663594680 is 86495366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663594683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 772091 + ... + 772949.

It is an arithmetic number, because the mean of its divisors is an integer number (13932000).

Almost surely, 2^663594680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663594680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891648000).

663594680 is an abundant number, since it is smaller than the sum of its proper divisors (1119701320).

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

663594680 is a wasteful number, since it uses less digits than its factorization.

663594680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 663594680 is about 25760.3315196059. The cubic root of 663594680 is about 872.2365846569.

The spelling of 663594680 in words is "six hundred sixty-three million, five hundred ninety-four thousand, six hundred eighty".