166686873 has 8 divisors (see below), whose sum is σ = 222309600. Its totient is φ = 111094368.

The previous prime is 166686851. The next prime is 166686881. The reversal of 166686873 is 378686661.

It is a happy number.

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

It is not a de Polignac number, because 166686873 - 2⁸ = 166686617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166686823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14598 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (27788700).

Almost surely, 2^166686873 is an apocalyptic number.

It is an amenable number.

166686873 is a deficient number, since it is larger than the sum of its proper divisors (55622727).

166686873 is an equidigital number, since it uses as much as digits as its factorization.

166686873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111.

The product of its digits is 1741824, while the sum is 51.

The square root of 166686873 is about 12910.7270515645. The cubic root of 166686873 is about 550.3434471979.

The spelling of 166686873 in words is "one hundred sixty-six million, six hundred eighty-six thousand, eight hundred seventy-three".