166580318400 has 84 divisors (see below), whose sum is σ = 546522277032. Its totient is φ = 44421416960.

The previous prime is 166580318389. The next prime is 166580318417. The reversal of 166580318400 is 4813085661.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17347317 + ... + 17356916.

Almost surely, 2^166580318400 is an apocalyptic number.

166580318400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166580318400 is an abundant number, since it is smaller than the sum of its proper divisors (379941958632).

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

166580318400 is a wasteful number, since it uses less digits than its factorization.

166580318400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34704258 (or 34704243 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 166580318400 in words is "one hundred sixty-six billion, five hundred eighty million, three hundred eighteen thousand, four hundred".