16661056003504 has 20 divisors (see below), whose sum is σ = 35215413825960. Its totient is φ = 7573207274240.

The previous prime is 16661056003469. The next prime is 16661056003517. The reversal of 16661056003504 is 40530065016661.

16661056003504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47332545289 + ... + 47332545640.

It is an arithmetic number, because the mean of its divisors is an integer number (1760770691298).

Almost surely, 2^{16661056003504} is an apocalyptic number.

It is an amenable number.

16661056003504 is an abundant number, since it is smaller than the sum of its proper divisors (18554357822456).

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

16661056003504 is a wasteful number, since it uses less digits than its factorization.

16661056003504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94665090948 (or 94665090942 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 16661056003504 in words is "sixteen trillion, six hundred sixty-one billion, fifty-six million, three thousand, five hundred four".