65165613 has 4 divisors (see below), whose sum is σ = 86887488. Its totient is φ = 43443740.

The previous prime is 65165609. The next prime is 65165623. The reversal of 65165613 is 31656156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65165613 - 2² = 65165609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65165603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10860933 + ... + 10860938.

It is an arithmetic number, because the mean of its divisors is an integer number (21721872).

Almost surely, 2^65165613 is an apocalyptic number.

It is an amenable number.

65165613 is a deficient number, since it is larger than the sum of its proper divisors (21721875).

65165613 is a wasteful number, since it uses less digits than its factorization.

65165613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721874.

The product of its digits is 16200, while the sum is 33.

The square root of 65165613 is about 8072.5220965941. The cubic root of 65165613 is about 402.4137654590.

The spelling of 65165613 in words is "sixty-five million, one hundred sixty-five thousand, six hundred thirteen".