16851766699 has 2 divisors, whose sum is σ = 16851766700. Its totient is φ = 16851766698.

The previous prime is 16851766697. The next prime is 16851766709. The reversal of 16851766699 is 99666715861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16851766699 - 2¹ = 16851766697 is a prime.

Together with 16851766697, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16851766699.

It is not a weakly prime, because it can be changed into another prime (16851766697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8425883349 + 8425883350.

It is an arithmetic number, because the mean of its divisors is an integer number (8425883350).

Almost surely, 2^16851766699 is an apocalyptic number.

16851766699 is a deficient number, since it is larger than the sum of its proper divisors (1).

16851766699 is an equidigital number, since it uses as much as digits as its factorization.

16851766699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 64.

The spelling of 16851766699 in words is "sixteen billion, eight hundred fifty-one million, seven hundred sixty-six thousand, six hundred ninety-nine".