166179986 has 8 divisors (see below), whose sum is σ = 284880000. Its totient is φ = 71219988.

The previous prime is 166179911. The next prime is 166179989. The reversal of 166179986 is 689971661.

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

It is not an unprimeable number, because it can be changed into a prime (166179989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5934986 + ... + 5935013.

It is an arithmetic number, because the mean of its divisors is an integer number (35610000).

Almost surely, 2^166179986 is an apocalyptic number.

166179986 is a deficient number, since it is larger than the sum of its proper divisors (118700014).

166179986 is a wasteful number, since it uses less digits than its factorization.

166179986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11870008.

The product of its digits is 979776, while the sum is 53.

The square root of 166179986 is about 12891.0816458511. The cubic root of 166179986 is about 549.7850245246.

The spelling of 166179986 in words is "one hundred sixty-six million, one hundred seventy-nine thousand, nine hundred eighty-six".