16685003317 has 2 divisors, whose sum is σ = 16685003318. Its totient is φ = 16685003316.

The previous prime is 16685003239. The next prime is 16685003323. The reversal of 16685003317 is 71330058661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9263870001 + 7421133316 = 96249^2 + 86146^2 .

It is a cyclic number.

It is not a de Polignac number, because 16685003317 - 2⁷ = 16685003189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16685003317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16685003327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342501658 + 8342501659.

It is an arithmetic number, because the mean of its divisors is an integer number (8342501659).

Almost surely, 2^16685003317 is an apocalyptic number.

It is an amenable number.

16685003317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685003317 is an equidigital number, since it uses as much as digits as its factorization.

16685003317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 16685003317 in words is "sixteen billion, six hundred eighty-five million, three thousand, three hundred seventeen".