663904073280 has 168 divisors, whose sum is σ = 2452041799488. Its totient is φ = 151749491712.

The previous prime is 663904073279. The next prime is 663904073333. The reversal of 663904073280 is 82370409366.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7009764 + ... + 7103843.

Almost surely, 2^663904073280 is an apocalyptic number.

663904073280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663904073280 is an abundant number, since it is smaller than the sum of its proper divisors (1788137726208).

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

663904073280 is a wasteful number, since it uses less digits than its factorization.

663904073280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14113641 (or 14113624 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 663904073280 in words is "six hundred sixty-three billion, nine hundred four million, seventy-three thousand, two hundred eighty".