811003866 has 32 divisors (see below), whose sum is σ = 1730783040. Its totient is φ = 252595584.

The previous prime is 811003861. The next prime is 811003877. The reversal of 811003866 is 668300118.

It is not an unprimeable number, because it can be changed into a prime (811003861) 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, 40405 + ... + 57048.

It is an arithmetic number, because the mean of its divisors is an integer number (54086970).

Almost surely, 2^811003866 is an apocalyptic number.

811003866 is an abundant number, since it is smaller than the sum of its proper divisors (919779174).

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

811003866 is a wasteful number, since it uses less digits than its factorization.

811003866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97550.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 811003866 is about 28478.1296085259. The cubic root of 811003866 is about 932.5546847924.

The spelling of 811003866 in words is "eight hundred eleven million, three thousand, eight hundred sixty-six".