168685006687 has 2 divisors, whose sum is σ = 168685006688. Its totient is φ = 168685006686.

The previous prime is 168685006669. The next prime is 168685006723. The reversal of 168685006687 is 786600586861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168685006687 - 2³¹ = 166537523039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168685006657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84342503343 + 84342503344.

It is an arithmetic number, because the mean of its divisors is an integer number (84342503344).

Almost surely, 2^168685006687 is an apocalyptic number.

168685006687 is a deficient number, since it is larger than the sum of its proper divisors (1).

168685006687 is an equidigital number, since it uses as much as digits as its factorization.

168685006687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 168685006687 in words is "one hundred sixty-eight billion, six hundred eighty-five million, six thousand, six hundred eighty-seven".