166838116774 has 24 divisors (see below), whose sum is σ = 291713346000. Its totient is φ = 71355208176.

The previous prime is 166838116733. The next prime is 166838116787. The reversal of 166838116774 is 477611838661.

It is a happy number.

166838116774 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1700149 + ... + 1795600.

It is an arithmetic number, because the mean of its divisors is an integer number (12154722750).

Almost surely, 2^166838116774 is an apocalyptic number.

166838116774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166838116774 is a deficient number, since it is larger than the sum of its proper divisors (124875229226).

166838116774 is a wasteful number, since it uses less digits than its factorization.

166838116774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496252 (or 3496245 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 58.

The spelling of 166838116774 in words is "one hundred sixty-six billion, eight hundred thirty-eight million, one hundred sixteen thousand, seven hundred seventy-four".