813956660 has 48 divisors (see below), whose sum is σ = 1945786752. Its totient is φ = 283113600.

The previous prime is 813956657. The next prime is 813956699. The reversal of 813956660 is 66659318.

813956660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75371 + ... + 85490.

It is an arithmetic number, because the mean of its divisors is an integer number (40537224).

Almost surely, 2^813956660 is an apocalyptic number.

It is an amenable number.

813956660 is an abundant number, since it is smaller than the sum of its proper divisors (1131830092).

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

813956660 is a wasteful number, since it uses less digits than its factorization.

813956660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160904 (or 160902 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 813956660 is about 28529.9256921570. The cubic root of 813956660 is about 933.6850972823.

The spelling of 813956660 in words is "eight hundred thirteen million, nine hundred fifty-six thousand, six hundred sixty".