166439962673920 has 72 divisors (see below), whose sum is σ = 429343086450096. Its totient is φ = 61454755442688.

The previous prime is 166439962673891. The next prime is 166439962673927. The reversal of 166439962673920 is 29376269934661.

It is a super-2 number, since 2×166439962673920² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166439962673927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001184162 + ... + 5001217441.

It is an arithmetic number, because the mean of its divisors is an integer number (5963098422918).

Almost surely, 2^{166439962673920} is an apocalyptic number.

166439962673920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166439962673920 is an abundant number, since it is smaller than the sum of its proper divisors (262903123776176).

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

166439962673920 is a wasteful number, since it uses less digits than its factorization.

166439962673920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002401637 (or 10002401623 counting only the distinct ones).

The product of its (nonzero) digits is 952342272, while the sum is 73.

The spelling of 166439962673920 in words is "one hundred sixty-six trillion, four hundred thirty-nine billion, nine hundred sixty-two million, six hundred seventy-three thousand, nine hundred twenty".