161665167 has 16 divisors (see below), whose sum is σ = 227208960. Its totient is φ = 101964672.

The previous prime is 161665151. The next prime is 161665177. The reversal of 161665167 is 761566161.

It is not a de Polignac number, because 161665167 - 2⁴ = 161665151 is a prime.

It is a super-2 number, since 2×161665167² = 52271252442275778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161665117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54238 + ... + 57140.

It is an arithmetic number, because the mean of its divisors is an integer number (14200560).

Almost surely, 2^161665167 is an apocalyptic number.

161665167 is a deficient number, since it is larger than the sum of its proper divisors (65543793).

161665167 is a wasteful number, since it uses less digits than its factorization.

161665167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902.

The product of its digits is 45360, while the sum is 39.

The square root of 161665167 is about 12714.7617751966. The cubic root of 161665167 is about 544.7603435257.

The spelling of 161665167 in words is "one hundred sixty-one million, six hundred sixty-five thousand, one hundred sixty-seven".