811666118 has 16 divisors (see below), whose sum is σ = 1267906176. Its totient is φ = 389262720.

The previous prime is 811666117. The next prime is 811666133.

811666118 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811666117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50921 + ... + 64932.

It is an arithmetic number, because the mean of its divisors is an integer number (79244136).

Almost surely, 2^811666118 is an apocalyptic number.

811666118 is a deficient number, since it is larger than the sum of its proper divisors (456240058).

811666118 is a wasteful number, since it uses less digits than its factorization.

811666118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115999.

The product of its digits is 13824, while the sum is 38.

The square root of 811666118 is about 28489.7546145979. The cubic root of 811666118 is about 932.8084518433.

The spelling of 811666118 in words is "eight hundred eleven million, six hundred sixty-six thousand, one hundred eighteen".