16669643336 has 16 divisors (see below), whose sum is σ = 31261265340. Its totient is φ = 8333305920.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643336 is 63334696661.

It can be written as a sum of positive squares in 2 ways, for example, as 15324954436 + 1344688900 = 123794^2 + 36670^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142031 + ... + 231326.

Almost surely, 2^16669643336 is an apocalyptic number.

It is an amenable number.

16669643336 is a deficient number, since it is larger than the sum of its proper divisors (14591622004).

16669643336 is a wasteful number, since it uses less digits than its factorization.

16669643336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378944 (or 378940 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 53.

The spelling of 16669643336 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred thirty-six".