166664994 has 8 divisors (see below), whose sum is σ = 333330000. Its totient is φ = 55554996.

The previous prime is 166664963. The next prime is 166665011. The reversal of 166664994 is 499466661.

It is a sphenic number, since it is the product of 3 distinct primes.

166664994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13888744 + ... + 13888755.

It is an arithmetic number, because the mean of its divisors is an integer number (41666250).

Almost surely, 2^166664994 is an apocalyptic number.

166664994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166664994 is a wasteful number, since it uses less digits than its factorization.

166664994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27777504.

The product of its digits is 1679616, while the sum is 51.

The square root of 166664994 is about 12909.8797050941. The cubic root of 166664994 is about 550.3193671351.

The spelling of 166664994 in words is "one hundred sixty-six million, six hundred sixty-four thousand, nine hundred ninety-four".