4431918866 has 8 divisors (see below), whose sum is σ = 6648697020. Its totient is φ = 2215686528.

The previous prime is 4431918859. The next prime is 4431918889. The reversal of 4431918866 is 6688191344.

It can be written as a sum of positive squares in 2 ways, for example, as 3183780625 + 1248138241 = 56425^2 + 35329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115511 + ... + 149018.

Almost surely, 2^4431918866 is an apocalyptic number.

4431918866 is a deficient number, since it is larger than the sum of its proper divisors (2216778154).

4431918866 is a wasteful number, since it uses less digits than its factorization.

4431918866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272908.

The product of its digits is 995328, while the sum is 50.

The square root of 4431918866 is about 66572.6585468839. The cubic root of 4431918866 is about 1642.5953930049.

The spelling of 4431918866 in words is "four billion, four hundred thirty-one million, nine hundred eighteen thousand, eight hundred sixty-six".