663758949857366 has 96 divisors (see below), whose sum is σ = 1140425973540000. Its totient is φ = 289169236984320.

The previous prime is 663758949857347. The next prime is 663758949857389.

663758949857366 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1682305085 + ... + 1682699591.

It is an arithmetic number, because the mean of its divisors is an integer number (11879437224375).

Almost surely, 2^{663758949857366} is an apocalyptic number.

663758949857366 is a deficient number, since it is larger than the sum of its proper divisors (476667023682634).

663758949857366 is a wasteful number, since it uses less digits than its factorization.

663758949857366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396318 (or 396307 counting only the distinct ones).

The product of its digits is 296284262400, while the sum is 92.

The spelling of 663758949857366 in words is "six hundred sixty-three trillion, seven hundred fifty-eight billion, nine hundred forty-nine million, eight hundred fifty-seven thousand, three hundred sixty-six".