16669643351 has 2 divisors, whose sum is σ = 16669643352. Its totient is φ = 16669643350.

The previous prime is 16669643303. The next prime is 16669643371. The reversal of 16669643351 is 15334696661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16669643351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16669643351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16669643371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334821675 + 8334821676.

It is an arithmetic number, because the mean of its divisors is an integer number (8334821676).

Almost surely, 2^16669643351 is an apocalyptic number.

16669643351 is a deficient number, since it is larger than the sum of its proper divisors (1).

16669643351 is an equidigital number, since it uses as much as digits as its factorization.

16669643351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 50.

The spelling of 16669643351 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred fifty-one".