663899998366 has 24 divisors (see below), whose sum is σ = 1094724460872. Its totient is φ = 301741717200.

The previous prime is 663899998351. The next prime is 663899998373.

663899998366 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 663899998366.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2306601 + ... + 2578411.

It is an arithmetic number, because the mean of its divisors is an integer number (45613519203).

Almost surely, 2^663899998366 is an apocalyptic number.

663899998366 is a deficient number, since it is larger than the sum of its proper divisors (430824462506).

663899998366 is a wasteful number, since it uses less digits than its factorization.

663899998366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281928 (or 281917 counting only the distinct ones).

The product of its digits is 4897760256, while the sum is 82.

The spelling of 663899998366 in words is "six hundred sixty-three billion, eight hundred ninety-nine million, nine hundred ninety-eight thousand, three hundred sixty-six".