811316660 has 48 divisors (see below), whose sum is σ = 2124178560. Its totient is φ = 252877440.

The previous prime is 811316659. The next prime is 811316711. The reversal of 811316660 is 66613118.

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, 261875 + ... + 264954.

It is an arithmetic number, because the mean of its divisors is an integer number (44253720).

Almost surely, 2^811316660 is an apocalyptic number.

It is an amenable number.

811316660 is an abundant number, since it is smaller than the sum of its proper divisors (1312861900).

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

811316660 is a wasteful number, since it uses less digits than its factorization.

811316660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526856 (or 526854 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 811316660 is about 28483.6209074619. The cubic root of 811316660 is about 932.6745609233.

Adding to 811316660 its reverse (66613118), we get a palindrome (877929778).

The spelling of 811316660 in words is "eight hundred eleven million, three hundred sixteen thousand, six hundred sixty".