16685003390687 has 2 divisors, whose sum is σ = 16685003390688. Its totient is φ = 16685003390686.

The previous prime is 16685003390677. The next prime is 16685003390711. The reversal of 16685003390687 is 78609330058661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16685003390687 - 2⁸ = 16685003390431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16685003390677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342501695343 + 8342501695344.

It is an arithmetic number, because the mean of its divisors is an integer number (8342501695344).

Almost surely, 2^{16685003390687} is an apocalyptic number.

16685003390687 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685003390687 is an equidigital number, since it uses as much as digits as its factorization.

16685003390687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 16685003390687 in words is "sixteen trillion, six hundred eighty-five billion, three million, three hundred ninety thousand, six hundred eighty-seven".