16669643344 has 10 divisors (see below), whose sum is σ = 32297434010. Its totient is φ = 8334821664.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643344 is 44334696661.

It can be written as a sum of positive squares in only one way, i.e., 15640003600 + 1029639744 = 125060^2 + 32088^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16669643291 and 16669643300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520926339 + ... + 520926370.

It is an arithmetic number, because the mean of its divisors is an integer number (3229743401).

Almost surely, 2^16669643344 is an apocalyptic number.

It is an amenable number.

16669643344 is a deficient number, since it is larger than the sum of its proper divisors (15627790666).

16669643344 is a wasteful number, since it uses less digits than its factorization.

16669643344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041852717 (or 1041852711 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 52.

The spelling of 16669643344 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred forty-four".