165738868 has 6 divisors (see below), whose sum is σ = 290043026. Its totient is φ = 82869432.

The previous prime is 165738823. The next prime is 165738871. The reversal of 165738868 is 868837561.

It can be written as a sum of positive squares in only one way, i.e., 120956004 + 44782864 = 10998^2 + 6692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20717355 + ... + 20717362.

Almost surely, 2^165738868 is an apocalyptic number.

It is an amenable number.

165738868 is a deficient number, since it is larger than the sum of its proper divisors (124304158).

165738868 is a wasteful number, since it uses less digits than its factorization.

165738868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41434721 (or 41434719 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 165738868 is about 12873.9608512687. The cubic root of 165738868 is about 549.2981328119.

The spelling of 165738868 in words is "one hundred sixty-five million, seven hundred thirty-eight thousand, eight hundred sixty-eight".