764072661 has 16 divisors (see below), whose sum is σ = 1112094720. Its totient is φ = 462775920.

The previous prime is 764072653. The next prime is 764072663. The reversal of 764072661 is 166270467.

It is not a de Polignac number, because 764072661 - 2³ = 764072653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764072663) 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, 51466 + ... + 64628.

It is an arithmetic number, because the mean of its divisors is an integer number (69505920).

Almost surely, 2^764072661 is an apocalyptic number.

It is an amenable number.

764072661 is a deficient number, since it is larger than the sum of its proper divisors (348022059).

764072661 is a wasteful number, since it uses less digits than its factorization.

764072661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14936.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 764072661 is about 27641.8642822802. The cubic root of 764072661 is about 914.2077253080.

The spelling of 764072661 in words is "seven hundred sixty-four million, seventy-two thousand, six hundred sixty-one".