621072666504 has 80 divisors (see below), whose sum is σ = 1742997098700. Its totient is φ = 206617385088.

The previous prime is 621072666373. The next prime is 621072666523. The reversal of 621072666504 is 405666270126.

It can be written as a sum of positive squares in 2 ways, for example, as 481772033604 + 139300632900 = 694098^2 + 373230^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 621072666504.

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 19 ways as a sum of consecutive naturals, for example, 611667 + ... + 1271330.

Almost surely, 2^621072666504 is an apocalyptic number.

It is an amenable number.

621072666504 is an abundant number, since it is smaller than the sum of its proper divisors (1121924432196).

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

621072666504 is a wasteful number, since it uses less digits than its factorization.

621072666504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883524 (or 1883511 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 621072666504 in words is "six hundred twenty-one billion, seventy-two million, six hundred sixty-six thousand, five hundred four".