166396238 has 16 divisors (see below), whose sum is σ = 265615200. Its totient is φ = 77907456.

The previous prime is 166396231. The next prime is 166396249. The reversal of 166396238 is 832693661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166396231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5531 + ... + 19062.

It is an arithmetic number, because the mean of its divisors is an integer number (16600950).

Almost surely, 2^166396238 is an apocalyptic number.

166396238 is a deficient number, since it is larger than the sum of its proper divisors (99218962).

166396238 is a wasteful number, since it uses less digits than its factorization.

166396238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24811.

The product of its digits is 279936, while the sum is 44.

The square root of 166396238 is about 12899.4665781186. The cubic root of 166396238 is about 550.0234017591.

The spelling of 166396238 in words is "one hundred sixty-six million, three hundred ninety-six thousand, two hundred thirty-eight".