166999165 has 8 divisors (see below), whose sum is σ = 201600000. Its totient is φ = 132798672.

The previous prime is 166999163. The next prime is 166999169. The reversal of 166999165 is 561999661.

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 166999165 - 2¹ = 166999163 is a prime.

It is a super-2 number, since 2×166999165² = 55777442221394450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166999163) 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, 99165 + ... + 100834.

It is an arithmetic number, because the mean of its divisors is an integer number (25200000).

Almost surely, 2^166999165 is an apocalyptic number.

It is an amenable number.

166999165 is a deficient number, since it is larger than the sum of its proper divisors (34600835).

166999165 is a wasteful number, since it uses less digits than its factorization.

166999165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200171.

The product of its digits is 787320, while the sum is 52.

The square root of 166999165 is about 12922.8156761597. The cubic root of 166999165 is about 550.6869268241.

The spelling of 166999165 in words is "one hundred sixty-six million, nine hundred ninety-nine thousand, one hundred sixty-five".