166386959 has 8 divisors (see below), whose sum is σ = 167920800. Its totient is φ = 164858976.

The previous prime is 166386947. The next prime is 166386989. The reversal of 166386959 is 959683661.

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

It is a cyclic number.

It is not a de Polignac number, because 166386959 - 2¹² = 166382863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166386959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166386919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71417 + ... + 73709.

It is an arithmetic number, because the mean of its divisors is an integer number (20990100).

Almost surely, 2^166386959 is an apocalyptic number.

166386959 is a deficient number, since it is larger than the sum of its proper divisors (1533841).

166386959 is a wasteful number, since it uses less digits than its factorization.

166386959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929.

The product of its digits is 2099520, while the sum is 53.

The square root of 166386959 is about 12899.1069070692. The cubic root of 166386959 is about 550.0131776457.

The spelling of 166386959 in words is "one hundred sixty-six million, three hundred eighty-six thousand, nine hundred fifty-nine".