663764320 has 96 divisors (see below), whose sum is σ = 1681948800. Its totient is φ = 246644736.

The previous prime is 663764287. The next prime is 663764341. The reversal of 663764320 is 23467366.

It is a self number, because there is not a number n which added to its sum of digits gives 663764320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213336 + ... + 216424.

It is an arithmetic number, because the mean of its divisors is an integer number (17520300).

Almost surely, 2^663764320 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 663764320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840974400).

663764320 is an abundant number, since it is smaller than the sum of its proper divisors (1018184480).

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

663764320 is a wasteful number, since it uses less digits than its factorization.

663764320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200 (or 3192 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 663764320 is about 25763.6239686889. The cubic root of 663764320 is about 872.3109039223.

The spelling of 663764320 in words is "six hundred sixty-three million, seven hundred sixty-four thousand, three hundred twenty".