663996436488 has 96 divisors (see below), whose sum is σ = 2242065908160. Its totient is φ = 172466605440.

The previous prime is 663996436471. The next prime is 663996436513. The reversal of 663996436488 is 884634699366.

663996436488 is a `hidden beast` number, since 6 + 63 + 9 + 96 + 436 + 48 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

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, 59878695 + ... + 59889782.

It is an arithmetic number, because the mean of its divisors is an integer number (23354853210).

Almost surely, 2^663996436488 is an apocalyptic number.

It is an amenable number.

663996436488 is an abundant number, since it is smaller than the sum of its proper divisors (1578069471672).

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

663996436488 is a wasteful number, since it uses less digits than its factorization.

663996436488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119768507 (or 119768500 counting only the distinct ones).

The product of its digits is 967458816, while the sum is 72.

The spelling of 663996436488 in words is "six hundred sixty-three billion, nine hundred ninety-six million, four hundred thirty-six thousand, four hundred eighty-eight".