165760065 has 24 divisors (see below), whose sum is σ = 287794728. Its totient is φ = 88258560.

The previous prime is 165760051. The next prime is 165760093. The reversal of 165760065 is 560067561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 84327489 + 81432576 = 9183^2 + 9024^2 .

It is not a de Polignac number, because 165760065 - 2⁵ = 165760033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27745 + ... + 33185.

It is an arithmetic number, because the mean of its divisors is an integer number (11991447).

Almost surely, 2^165760065 is an apocalyptic number.

165760065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165760065 is a deficient number, since it is larger than the sum of its proper divisors (122034663).

165760065 is a wasteful number, since it uses less digits than its factorization.

165760065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129 (or 6126 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 165760065 is about 12874.7840758593. The cubic root of 165760065 is about 549.3215491180.

The spelling of 165760065 in words is "one hundred sixty-five million, seven hundred sixty thousand, sixty-five".