663720960 has 176 divisors, whose sum is σ = 2426530176. Its totient is φ = 151683072.

The previous prime is 663720917. The next prime is 663720973. The reversal of 663720960 is 69027366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104434 + ... + 110606.

Almost surely, 2^663720960 is an apocalyptic number.

663720960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663720960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213265088).

663720960 is an abundant number, since it is smaller than the sum of its proper divisors (1762809216).

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

663720960 is a wasteful number, since it uses less digits than its factorization.

663720960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 663720960 is about 25762.7824584225. The cubic root of 663720960 is about 872.2919091158.

The spelling of 663720960 in words is "six hundred sixty-three million, seven hundred twenty thousand, nine hundred sixty".