65765133 has 24 divisors (see below), whose sum is σ = 109881408. Its totient is φ = 37124352.

The previous prime is 65765093. The next prime is 65765143. The reversal of 65765133 is 33156756.

It is a happy number.

65765133 is a `hidden beast` number, since 6 + 576 + 51 + 33 = 666.

It is not a de Polignac number, because 65765133 - 2²⁵ = 32210701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65765143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1060 + ... + 11517.

It is an arithmetic number, because the mean of its divisors is an integer number (4578392).

Almost surely, 2^65765133 is an apocalyptic number.

65765133 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

65765133 is a deficient number, since it is larger than the sum of its proper divisors (44116275).

65765133 is a wasteful number, since it uses less digits than its factorization.

65765133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12673 (or 12670 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 65765133 is about 8109.5704571821. The cubic root of 65765133 is about 403.6440616407.

The spelling of 65765133 in words is "sixty-five million, seven hundred sixty-five thousand, one hundred thirty-three".