663368880 has 80 divisors (see below), whose sum is σ = 2059020000. Its totient is φ = 176676864.

The previous prime is 663368851. The next prime is 663368891. The reversal of 663368880 is 88863366.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 298654 + ... + 300866.

It is an arithmetic number, because the mean of its divisors is an integer number (25737750).

Almost surely, 2^663368880 is an apocalyptic number.

663368880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663368880 is an abundant number, since it is smaller than the sum of its proper divisors (1395651120).

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

663368880 is a wasteful number, since it uses less digits than its factorization.

663368880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 663368880 is about 25755.9484391470. The cubic root of 663368880 is about 872.1376420495.

The spelling of 663368880 in words is "six hundred sixty-three million, three hundred sixty-eight thousand, eight hundred eighty".