166740733872 has 80 divisors (see below), whose sum is σ = 481819980000. Its totient is φ = 55207201536.

The previous prime is 166740733867. The next prime is 166740733897. The reversal of 166740733872 is 278337047661.

166740733872 is a `hidden beast` number, since 166 + 7 + 407 + 3 + 3 + 8 + 72 = 666.

166740733872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166740733872² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230847 + ... + 1359582.

It is an arithmetic number, because the mean of its divisors is an integer number (6022749750).

Almost surely, 2^166740733872 is an apocalyptic number.

166740733872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166740733872 is an abundant number, since it is smaller than the sum of its proper divisors (315079246128).

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

166740733872 is a wasteful number, since it uses less digits than its factorization.

166740733872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590595 (or 2590583 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 166740733872 in words is "one hundred sixty-six billion, seven hundred forty million, seven hundred thirty-three thousand, eight hundred seventy-two".