166685654324 has 48 divisors (see below), whose sum is σ = 342931760640. Its totient is φ = 69402627840.

The previous prime is 166685654299. The next prime is 166685654339. The reversal of 166685654324 is 423456586661.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166685654324.

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, 29387 + ... + 578130.

It is an arithmetic number, because the mean of its divisors is an integer number (7144411680).

Almost surely, 2^166685654324 is an apocalyptic number.

166685654324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166685654324 is an abundant number, since it is smaller than the sum of its proper divisors (176246106316).

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

166685654324 is a wasteful number, since it uses less digits than its factorization.

166685654324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607808 (or 607806 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 56.

The spelling of 166685654324 in words is "one hundred sixty-six billion, six hundred eighty-five million, six hundred fifty-four thousand, three hundred twenty-four".