166178409264 has 120 divisors (see below), whose sum is σ = 531605811360. Its totient is φ = 47470731264.

The previous prime is 166178409263. The next prime is 166178409301. The reversal of 166178409264 is 462904871661.

166178409264 is a `hidden beast` number, since 1 + 6 + 6 + 178 + 409 + 2 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 166178409264.

It is not an unprimeable number, because it can be changed into a prime (166178409263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7021002 + ... + 7044630.

It is an arithmetic number, because the mean of its divisors is an integer number (4430048428).

Almost surely, 2^166178409264 is an apocalyptic number.

166178409264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166178409264 is an abundant number, since it is smaller than the sum of its proper divisors (365427402096).

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

166178409264 is a wasteful number, since it uses less digits than its factorization.

166178409264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30627 (or 30618 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 166178409264 in words is "one hundred sixty-six billion, one hundred seventy-eight million, four hundred nine thousand, two hundred sixty-four".