65865725 has 6 divisors (see below), whose sum is σ = 81673530. Its totient is φ = 52692560.

The previous prime is 65865713. The next prime is 65865773. The reversal of 65865725 is 52756856.

It can be written as a sum of positive squares in 3 ways, for example, as 3976036 + 61889689 = 1994^2 + 7867^2 .

It is not a de Polignac number, because 65865725 - 2¹² = 65861629 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1317290 + ... + 1317339.

It is an arithmetic number, because the mean of its divisors is an integer number (13612255).

Almost surely, 2^65865725 is an apocalyptic number.

It is an amenable number.

65865725 is a deficient number, since it is larger than the sum of its proper divisors (15807805).

65865725 is a wasteful number, since it uses less digits than its factorization.

65865725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634639 (or 2634634 counting only the distinct ones).

The product of its digits is 504000, while the sum is 44.

The square root of 65865725 is about 8115.7701421369. The cubic root of 65865725 is about 403.8497566514.

The spelling of 65865725 in words is "sixty-five million, eight hundred sixty-five thousand, seven hundred twenty-five".