166166994 has 32 divisors (see below), whose sum is σ = 382556160. Its totient is φ = 47133072.

The previous prime is 166166981. The next prime is 166167077. The reversal of 166166994 is 499661661.

166166994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166166994² = 55222939789992072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8394 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (11954880).

Almost surely, 2^166166994 is an apocalyptic number.

166166994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166166994 is an abundant number, since it is smaller than the sum of its proper divisors (216389166).

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

166166994 is a wasteful number, since it uses less digits than its factorization.

166166994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614.

The product of its digits is 419904, while the sum is 48.

The square root of 166166994 is about 12890.5777217315. The cubic root of 166166994 is about 549.7706966998.

The spelling of 166166994 in words is "one hundred sixty-six million, one hundred sixty-six thousand, nine hundred ninety-four".