16669643343 has 4 divisors (see below), whose sum is σ = 22226191128. Its totient is φ = 11113095560.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643343 is 34334696661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16669643343 - 2⁶ = 16669643279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16669643303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778273888 + ... + 2778273893.

It is an arithmetic number, because the mean of its divisors is an integer number (5556547782).

Almost surely, 2^16669643343 is an apocalyptic number.

16669643343 is a deficient number, since it is larger than the sum of its proper divisors (5556547785).

16669643343 is an equidigital number, since it uses as much as digits as its factorization.

16669643343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556547784.

The product of its digits is 5038848, while the sum is 51.

The spelling of 16669643343 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred forty-three".