16665514939 has 2 divisors, whose sum is σ = 16665514940. Its totient is φ = 16665514938.

The previous prime is 16665514933. The next prime is 16665514963. The reversal of 16665514939 is 93941556661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16665514939 - 2⁵ = 16665514907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16665514939.

It is not a weakly prime, because it can be changed into another prime (16665514933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332757469 + 8332757470.

It is an arithmetic number, because the mean of its divisors is an integer number (8332757470).

Almost surely, 2^16665514939 is an apocalyptic number.

16665514939 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665514939 is an equidigital number, since it uses as much as digits as its factorization.

16665514939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 55.

The spelling of 16665514939 in words is "sixteen billion, six hundred sixty-five million, five hundred fourteen thousand, nine hundred thirty-nine".