166885720344 has 96 divisors (see below), whose sum is σ = 517744674720. Its totient is φ = 47571452928.

The previous prime is 166885720289. The next prime is 166885720403. The reversal of 166885720344 is 443027588661.

It is a happy number.

166885720344 is a `hidden beast` number, since 1 + 6 + 68 + 8 + 572 + 0 + 3 + 4 + 4 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164127 + ... + 600590.

It is an arithmetic number, because the mean of its divisors is an integer number (5393173695).

Almost surely, 2^166885720344 is an apocalyptic number.

166885720344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166885720344 is an abundant number, since it is smaller than the sum of its proper divisors (350858954376).

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

166885720344 is a wasteful number, since it uses less digits than its factorization.

166885720344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765169 (or 765162 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 166885720344 in words is "one hundred sixty-six billion, eight hundred eighty-five million, seven hundred twenty thousand, three hundred forty-four".