16668335039 has 2 divisors, whose sum is σ = 16668335040. Its totient is φ = 16668335038.

The previous prime is 16668335003. The next prime is 16668335041. The reversal of 16668335039 is 93053386661.

It is a strong prime.

It is an emirp because it is prime and its reverse (93053386661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16668335039 - 2²⁴ = 16651557823 is a prime.

It is a Sophie Germain prime.

Together with 16668335041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16668335059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334167519 + 8334167520.

It is an arithmetic number, because the mean of its divisors is an integer number (8334167520).

Almost surely, 2^16668335039 is an apocalyptic number.

16668335039 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668335039 is an equidigital number, since it uses as much as digits as its factorization.

16668335039 is an evil number, because the sum of its binary digits is even.

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

The spelling of 16668335039 in words is "sixteen billion, six hundred sixty-eight million, three hundred thirty-five thousand, thirty-nine".