764540660 has 48 divisors (see below), whose sum is σ = 1830756816. Its totient is φ = 265684992.

The previous prime is 764540629. The next prime is 764540663. The reversal of 764540660 is 66045467.

It can be written as a sum of positive squares in 8 ways, for example, as 119990116 + 644550544 = 10954^2 + 25388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764540663) 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, 82067 + ... + 90906.

It is an arithmetic number, because the mean of its divisors is an integer number (38140767).

Almost surely, 2^764540660 is an apocalyptic number.

It is an amenable number.

764540660 is an abundant number, since it is smaller than the sum of its proper divisors (1066216156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

764540660 is a wasteful number, since it uses less digits than its factorization.

764540660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173012 (or 173010 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 764540660 is about 27650.3283886467. The cubic root of 764540660 is about 914.3943397491.

The spelling of 764540660 in words is "seven hundred sixty-four million, five hundred forty thousand, six hundred sixty".