166994139 has 24 divisors (see below), whose sum is σ = 242332992. Its totient is φ = 102242400.

The previous prime is 166994041. The next prime is 166994141. The reversal of 166994139 is 931499661.

166994139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166994139 - 2⁷ = 166994011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166994239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114364 + ... + 115814.

It is an arithmetic number, because the mean of its divisors is an integer number (10097208).

Almost surely, 2^166994139 is an apocalyptic number.

166994139 is a deficient number, since it is larger than the sum of its proper divisors (75338853).

166994139 is a wasteful number, since it uses less digits than its factorization.

166994139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1694 counting only the distinct ones).

The product of its digits is 314928, while the sum is 48.

The square root of 166994139 is about 12922.6212124321. The cubic root of 166994139 is about 550.6814022850.

The spelling of 166994139 in words is "one hundred sixty-six million, nine hundred ninety-four thousand, one hundred thirty-nine".