811040668 has 48 divisors (see below), whose sum is σ = 1481760000. Its totient is φ = 388200960.

The previous prime is 811040621. The next prime is 811040683. The reversal of 811040668 is 866040118.

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, 1625083 + ... + 1625581.

It is an arithmetic number, because the mean of its divisors is an integer number (30870000).

Almost surely, 2^811040668 is an apocalyptic number.

It is an amenable number.

811040668 is a deficient number, since it is larger than the sum of its proper divisors (670719332).

811040668 is a wasteful number, since it uses less digits than its factorization.

811040668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 811040668 is about 28478.7757461588. The cubic root of 811040668 is about 932.5687905034.

The spelling of 811040668 in words is "eight hundred eleven million, forty thousand, six hundred sixty-eight".