65265681 has 16 divisors (see below), whose sum is σ = 94459904. Its totient is φ = 39844224.

The previous prime is 65265679. The next prime is 65265709. The reversal of 65265681 is 18656256.

It is not a de Polignac number, because 65265681 - 2¹ = 65265679 is a prime.

It is a super-2 number, since 2×65265681² = 8519218232787522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65265611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (5903744).

Almost surely, 2^65265681 is an apocalyptic number.

It is an amenable number.

65265681 is a deficient number, since it is larger than the sum of its proper divisors (29194223).

65265681 is a wasteful number, since it uses less digits than its factorization.

65265681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13320.

The product of its digits is 86400, while the sum is 39.

The square root of 65265681 is about 8078.7177819255. The cubic root of 65265681 is about 402.6196416578.

The spelling of 65265681 in words is "sixty-five million, two hundred sixty-five thousand, six hundred eighty-one".