663861674884 has 24 divisors (see below), whose sum is σ = 1169331766400. Its totient is φ = 329771844864.

The previous prime is 663861674881. The next prime is 663861674923. The reversal of 663861674884 is 488476168366.

It is not an unprimeable number, because it can be changed into a prime (663861674881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83904 + ... + 1155319.

Almost surely, 2^663861674884 is an apocalyptic number.

It is an amenable number.

663861674884 is a deficient number, since it is larger than the sum of its proper divisors (505470091516).

663861674884 is a wasteful number, since it uses less digits than its factorization.

663861674884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240099 (or 1240097 counting only the distinct ones).

The product of its digits is 222953472, while the sum is 67.

The spelling of 663861674884 in words is "six hundred sixty-three billion, eight hundred sixty-one million, six hundred seventy-four thousand, eight hundred eighty-four".