18880666161880 has 16 divisors (see below), whose sum is σ = 42481498864320. Its totient is φ = 7552266464736.

The previous prime is 18880666161857. The next prime is 18880666161953. The reversal of 18880666161880 is 8816166608881.

It is a congruent number.

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, 236008326984 + ... + 236008327063.

It is an arithmetic number, because the mean of its divisors is an integer number (2655093679020).

Almost surely, 2^{18880666161880} is an apocalyptic number.

18880666161880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18880666161880 is an abundant number, since it is smaller than the sum of its proper divisors (23600832702440).

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

18880666161880 is a wasteful number, since it uses less digits than its factorization.

18880666161880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472016654058 (or 472016654054 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 67.

The spelling of 18880666161880 in words is "eighteen trillion, eight hundred eighty billion, six hundred sixty-six million, one hundred sixty-one thousand, eight hundred eighty".