32668780666921 has 81 divisors (see below), whose sum is σ = 40180414730589. Its totient is φ = 26481800545200.

The previous prime is 32668780666913. The next prime is 32668780666933. The reversal of 32668780666921 is 12966608786623.

The square root of 32668780666921 is 5715661.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 32668780666921 - 2³ = 32668780666913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32668780616921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 120549006016 + ... + 120549006286.

Almost surely, 2^{32668780666921} is an apocalyptic number.

32668780666921 is the 5715661-st square number.

32668780666921 is the 2857831-st centered octagonal number.

It is an amenable number.

32668780666921 is a deficient number, since it is larger than the sum of its proper divisors (7511634063668).

32668780666921 is an frugal number, since it uses more digits than its factorization.

32668780666921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 70.

The spelling of 32668780666921 in words is "thirty-two trillion, six hundred sixty-eight billion, seven hundred eighty million, six hundred sixty-six thousand, nine hundred twenty-one".