815275660 has 24 divisors (see below), whose sum is σ = 1712619216. Its totient is φ = 326007360.

The previous prime is 815275619. The next prime is 815275667. The reversal of 815275660 is 66572518.

It is not an unprimeable number, because it can be changed into a prime (815275667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109455 + ... + 116665.

It is an arithmetic number, because the mean of its divisors is an integer number (71359134).

Almost surely, 2^815275660 is an apocalyptic number.

It is an amenable number.

815275660 is an abundant number, since it is smaller than the sum of its proper divisors (897343556).

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

815275660 is a wasteful number, since it uses less digits than its factorization.

815275660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12873 (or 12871 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 815275660 is about 28553.0324133882. The cubic root of 815275660 is about 934.1891642590.

The spelling of 815275660 in words is "eight hundred fifteen million, two hundred seventy-five thousand, six hundred sixty".