8185665818 has 32 divisors (see below), whose sum is σ = 14231246400. Its totient is φ = 3489890560.

The previous prime is 8185665811. The next prime is 8185665827.

8185665818 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (8185665811) 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, 72233 + ... + 146931.

It is an arithmetic number, because the mean of its divisors is an integer number (444726450).

Almost surely, 2^8185665818 is an apocalyptic number.

8185665818 is a deficient number, since it is larger than the sum of its proper divisors (6045580582).

8185665818 is a wasteful number, since it uses less digits than its factorization.

8185665818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75022.

The product of its digits is 3686400, while the sum is 56.

The square root of 8185665818 is about 90474.6694826790. The cubic root of 8185665818 is about 2015.3539775519.

The spelling of 8185665818 in words is "eight billion, one hundred eighty-five million, six hundred sixty-five thousand, eight hundred eighteen".