166421206176 has 48 divisors (see below), whose sum is σ = 437382842400. Its totient is φ = 55406792448.

The previous prime is 166421206163. The next prime is 166421206183. The reversal of 166421206176 is 671602124661.

166421206176 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×166421206176³ (a number of 35 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 965986 + ... + 1125153.

It is an arithmetic number, because the mean of its divisors is an integer number (9112142550).

Almost surely, 2^166421206176 is an apocalyptic number.

166421206176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166421206176 is an abundant number, since it is smaller than the sum of its proper divisors (270961636224).

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

166421206176 is a wasteful number, since it uses less digits than its factorization.

166421206176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091981 (or 2091973 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 166421206176 in words is "one hundred sixty-six billion, four hundred twenty-one million, two hundred six thousand, one hundred seventy-six".