764664811 has 6 divisors (see below), whose sum is σ = 812291300. Its totient is φ = 719684256.

The previous prime is 764664809. The next prime is 764664833. The reversal of 764664811 is 118466467.

It is not a de Polignac number, because 764664811 - 2¹ = 764664809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764664881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1322661 + ... + 1323238.

Almost surely, 2^764664811 is an apocalyptic number.

764664811 is a deficient number, since it is larger than the sum of its proper divisors (47626489).

764664811 is a wasteful number, since it uses less digits than its factorization.

764664811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645933 (or 2645916 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 764664811 is about 27652.5733160587. The cubic root of 764664811 is about 914.4438321364.

The spelling of 764664811 in words is "seven hundred sixty-four million, six hundred sixty-four thousand, eight hundred eleven".