8199669918 has 16 divisors (see below), whose sum is σ = 17890189056. Its totient is φ = 2484748440.

The previous prime is 8199669917. The next prime is 8199669949.

8199669918 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 124237423 = 8199669918 / (8 + 1 + 9 + 9 + 6 + 6 + 9 + 9 + 1 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8199669917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62118646 + ... + 62118777.

It is an arithmetic number, because the mean of its divisors is an integer number (1118136816).

Almost surely, 2^8199669918 is an apocalyptic number.

8199669918 is an abundant number, since it is smaller than the sum of its proper divisors (9690519138).

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

8199669918 is a wasteful number, since it uses less digits than its factorization.

8199669918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124237439.

The product of its digits is 15116544, while the sum is 66.

The square root of 8199669918 is about 90552.0287900829. The cubic root of 8199669918 is about 2016.5026171254.

The spelling of 8199669918 in words is "eight billion, one hundred ninety-nine million, six hundred sixty-nine thousand, nine hundred eighteen".