65717565 has 16 divisors (see below), whose sum is σ = 105361728. Its totient is φ = 34978176.

The previous prime is 65717549. The next prime is 65717579. The reversal of 65717565 is 56571756.

It is not a de Polignac number, because 65717565 - 2⁴ = 65717549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3657 + ... + 12033.

It is an arithmetic number, because the mean of its divisors is an integer number (6585108).

Almost surely, 2^65717565 is an apocalyptic number.

It is an amenable number.

65717565 is a deficient number, since it is larger than the sum of its proper divisors (39644163).

65717565 is a wasteful number, since it uses less digits than its factorization.

65717565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908.

The product of its digits is 220500, while the sum is 42.

The square root of 65717565 is about 8106.6370956149. The cubic root of 65717565 is about 403.5467194222.

The spelling of 65717565 in words is "sixty-five million, seven hundred seventeen thousand, five hundred sixty-five".