165608164 has 6 divisors (see below), whose sum is σ = 289814294. Its totient is φ = 82804080.

The previous prime is 165608159. The next prime is 165608171. The reversal of 165608164 is 461806561.

It can be written as a sum of positive squares in only one way, i.e., 100160064 + 65448100 = 10008^2 + 8090^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20701017 + ... + 20701024.

Almost surely, 2^165608164 is an apocalyptic number.

It is an amenable number.

165608164 is a deficient number, since it is larger than the sum of its proper divisors (124206130).

165608164 is a wasteful number, since it uses less digits than its factorization.

165608164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41402045 (or 41402043 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 165608164 is about 12868.8835568592. The cubic root of 165608164 is about 549.1537000962.

The spelling of 165608164 in words is "one hundred sixty-five million, six hundred eight thousand, one hundred sixty-four".