166396838 has 16 divisors (see below), whose sum is σ = 259530480. Its totient is φ = 79916256.

The previous prime is 166396829. The next prime is 166396847. The reversal of 166396838 is 838693661.

166396838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166396829) and next prime (166396847).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4145 + ... + 18707.

It is an arithmetic number, because the mean of its divisors is an integer number (16220655).

Almost surely, 2^166396838 is an apocalyptic number.

166396838 is a deficient number, since it is larger than the sum of its proper divisors (93133642).

166396838 is a wasteful number, since it uses less digits than its factorization.

166396838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14791.

The product of its digits is 1119744, while the sum is 50.

The square root of 166396838 is about 12899.4898348733. The cubic root of 166396838 is about 550.0240628591.

The spelling of 166396838 in words is "one hundred sixty-six million, three hundred ninety-six thousand, eight hundred thirty-eight".