166907990418 has 16 divisors (see below), whose sum is σ = 359494133376. Its totient is φ = 51356304720.

The previous prime is 166907990399. The next prime is 166907990471. The reversal of 166907990418 is 814099709661.

It is a happy number.

It is a Curzon 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, 1069922938 + ... + 1069923093.

It is an arithmetic number, because the mean of its divisors is an integer number (22468383336).

Almost surely, 2^166907990418 is an apocalyptic number.

166907990418 is an abundant number, since it is smaller than the sum of its proper divisors (192586142958).

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

166907990418 is a wasteful number, since it uses less digits than its factorization.

166907990418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139846049.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The spelling of 166907990418 in words is "one hundred sixty-six billion, nine hundred seven million, nine hundred ninety thousand, four hundred eighteen".