667117171 has 8 divisors (see below), whose sum is σ = 763603200. Its totient is φ = 570927048.

The previous prime is 667117163. The next prime is 667117181. The reversal of 667117171 is 171711766.

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 667117171 - 2³ = 667117163 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 667117171.

It is not an unprimeable number, because it can be changed into a prime (667117181) 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, 69121 + ... + 78178.

It is an arithmetic number, because the mean of its divisors is an integer number (95450400).

Almost surely, 2^667117171 is an apocalyptic number.

667117171 is a deficient number, since it is larger than the sum of its proper divisors (96486029).

667117171 is a wasteful number, since it uses less digits than its factorization.

667117171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147953.

The product of its digits is 12348, while the sum is 37.

The square root of 667117171 is about 25828.6114802945. The cubic root of 667117171 is about 873.7771963212. Note that the first 3 decimals are identical.

The spelling of 667117171 in words is "six hundred sixty-seven million, one hundred seventeen thousand, one hundred seventy-one".