165026065 has 4 divisors (see below), whose sum is σ = 198031284. Its totient is φ = 132020848.

The previous prime is 165026053. The next prime is 165026087. The reversal of 165026065 is 560620561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65804544 + 99221521 = 8112^2 + 9961^2 .

It is a cyclic number.

It is not a de Polignac number, because 165026065 - 2⁵ = 165026033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16502602 + ... + 16502611.

It is an arithmetic number, because the mean of its divisors is an integer number (49507821).

Almost surely, 2^165026065 is an apocalyptic number.

It is an amenable number.

165026065 is a deficient number, since it is larger than the sum of its proper divisors (33005219).

165026065 is an equidigital number, since it uses as much as digits as its factorization.

165026065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33005218.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165026065 is about 12846.2471173491. The cubic root of 165026065 is about 548.5095348302.

The spelling of 165026065 in words is "one hundred sixty-five million, twenty-six thousand, sixty-five".