663665979952 has 10 divisors (see below), whose sum is σ = 1285852836188. Its totient is φ = 331832989968.

The previous prime is 663665979941. The next prime is 663665979953. The reversal of 663665979952 is 259979566366.

It is not an unprimeable number, because it can be changed into a prime (663665979953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20739561858 + ... + 20739561889.

Almost surely, 2^663665979952 is an apocalyptic number.

It is an amenable number.

663665979952 is a deficient number, since it is larger than the sum of its proper divisors (622186856236).

663665979952 is a wasteful number, since it uses less digits than its factorization.

663665979952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41479123755 (or 41479123749 counting only the distinct ones).

The product of its digits is 992023200, while the sum is 73.

The spelling of 663665979952 in words is "six hundred sixty-three billion, six hundred sixty-five million, nine hundred seventy-nine thousand, nine hundred fifty-two".