166807769472 has 128 divisors (see below), whose sum is σ = 518226096000. Its totient is φ = 52676116992.

The previous prime is 166807769389. The next prime is 166807769509. The reversal of 166807769472 is 274967708661.

166807769472 is a `hidden beast` number, since 16 + 6 + 80 + 7 + 76 + 9 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204498 + ... + 1335825.

It is an arithmetic number, because the mean of its divisors is an integer number (4048641375).

Almost surely, 2^166807769472 is an apocalyptic number.

166807769472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166807769472 is an abundant number, since it is smaller than the sum of its proper divisors (351418326528).

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

166807769472 is a wasteful number, since it uses less digits than its factorization.

166807769472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540365 (or 2540347 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 63.

The spelling of 166807769472 in words is "one hundred sixty-six billion, eight hundred seven million, seven hundred sixty-nine thousand, four hundred seventy-two".