65664604611 has 10 divisors (see below), whose sum is σ = 98091569972. Its totient is φ = 43776403020.

The previous prime is 65664604589. The next prime is 65664604723. The reversal of 65664604611 is 11640646656.

It is a happy number.

65664604611 is a `hidden beast` number, since 6 + 566 + 46 + 0 + 46 + 1 + 1 = 666.

It is not a de Polignac number, because 65664604611 - 2¹⁸ = 65664342467 is a prime.

It is a super-2 number, since 2×65664604611² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65664604111) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 405336985 + ... + 405337146.

Almost surely, 2^65664604611 is an apocalyptic number.

65664604611 is a deficient number, since it is larger than the sum of its proper divisors (32426965361).

65664604611 is an equidigital number, since it uses as much as digits as its factorization.

65664604611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810674143 (or 810674134 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 65664604611 in words is "sixty-five billion, six hundred sixty-four million, six hundred four thousand, six hundred eleven".