4431659666 has 48 divisors (see below), whose sum is σ = 7871625216. Its totient is φ = 1865493504.

The previous prime is 4431659629. The next prime is 4431659717. The reversal of 4431659666 is 6669561344.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1280210 + ... + 1283666.

It is an arithmetic number, because the mean of its divisors is an integer number (163992192).

Almost surely, 2^4431659666 is an apocalyptic number.

4431659666 is a deficient number, since it is larger than the sum of its proper divisors (3439965550).

4431659666 is a wasteful number, since it uses less digits than its factorization.

4431659666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703 (or 3696 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 50.

The square root of 4431659666 is about 66570.7117732716. The cubic root of 4431659666 is about 1642.5633700792.

The spelling of 4431659666 in words is "four billion, four hundred thirty-one million, six hundred fifty-nine thousand, six hundred sixty-six".