166001172 has 12 divisors (see below), whose sum is σ = 387336096. Its totient is φ = 55333720.

The previous prime is 166001149. The next prime is 166001177. The reversal of 166001172 is 271100661.

166001172 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 (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6916704 + ... + 6916727.

It is an arithmetic number, because the mean of its divisors is an integer number (32278008).

Almost surely, 2^166001172 is an apocalyptic number.

166001172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166001172 is an abundant number, since it is smaller than the sum of its proper divisors (221334924).

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

166001172 is a wasteful number, since it uses less digits than its factorization.

166001172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13833438 (or 13833436 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 166001172 is about 12884.1442090657. The cubic root of 166001172 is about 549.5877594108.

The spelling of 166001172 in words is "one hundred sixty-six million, one thousand, one hundred seventy-two".