165946265 has 32 divisors (see below), whose sum is σ = 227681280. Its totient is φ = 115354624.

The previous prime is 165946259. The next prime is 165946273. The reversal of 165946265 is 562649561.

It is a cyclic number.

It is not a de Polignac number, because 165946265 - 2¹² = 165942169 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 55232 + ... + 58158.

It is an arithmetic number, because the mean of its divisors is an integer number (7115040).

Almost surely, 2^165946265 is an apocalyptic number.

It is an amenable number.

165946265 is a deficient number, since it is larger than the sum of its proper divisors (61735015).

165946265 is a wasteful number, since it uses less digits than its factorization.

165946265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001.

The product of its digits is 388800, while the sum is 44.

The square root of 165946265 is about 12882.0132355156. The cubic root of 165946265 is about 549.5271583471.

The spelling of 165946265 in words is "one hundred sixty-five million, nine hundred forty-six thousand, two hundred sixty-five".