65596813 has 4 divisors (see below), whose sum is σ = 65676960. Its totient is φ = 65516668.

The previous prime is 65596807. The next prime is 65596823. The reversal of 65596813 is 31869556.

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 a de Polignac number, because none of the positive numbers 2^k-65596813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65596813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65596823) 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, 38833 + ... + 40486.

It is an arithmetic number, because the mean of its divisors is an integer number (16419240).

Almost surely, 2^65596813 is an apocalyptic number.

It is an amenable number.

65596813 is a deficient number, since it is larger than the sum of its proper divisors (80147).

65596813 is an equidigital number, since it uses as much as digits as its factorization.

65596813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80146.

The product of its digits is 194400, while the sum is 43.

The square root of 65596813 is about 8099.1859467480. The cubic root of 65596813 is about 403.2994037589.

The spelling of 65596813 in words is "sixty-five million, five hundred ninety-six thousand, eight hundred thirteen".