166427813790720 has 176 divisors, whose sum is σ = 591454401237120. Its totient is φ = 44380750307328.

The previous prime is 166427813790713. The next prime is 166427813790809. The reversal of 166427813790720 is 27097318724661.

166427813790720 is a `hidden beast` number, since 1 + 6 + 6 + 427 + 8 + 137 + 9 + 0 + 72 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601814212 + ... + 602090691.

Almost surely, 2^{166427813790720} is an apocalyptic number.

166427813790720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166427813790720 is an abundant number, since it is smaller than the sum of its proper divisors (425026587446400).

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

166427813790720 is a wasteful number, since it uses less digits than its factorization.

166427813790720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203904937 (or 1203904913 counting only the distinct ones).

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

The spelling of 166427813790720 in words is "one hundred sixty-six trillion, four hundred twenty-seven billion, eight hundred thirteen million, seven hundred ninety thousand, seven hundred twenty".