16801666603 has 2 divisors, whose sum is σ = 16801666604. Its totient is φ = 16801666602.

The previous prime is 16801666597. The next prime is 16801666613. The reversal of 16801666603 is 30666610861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16801666603 - 2²⁹ = 16264795691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16801666603.

It is not a weakly prime, because it can be changed into another prime (16801666613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8400833301 + 8400833302.

It is an arithmetic number, because the mean of its divisors is an integer number (8400833302).

Almost surely, 2^16801666603 is an apocalyptic number.

16801666603 is a deficient number, since it is larger than the sum of its proper divisors (1).

16801666603 is an equidigital number, since it uses as much as digits as its factorization.

16801666603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 16801666603 in words is "sixteen billion, eight hundred one million, six hundred sixty-six thousand, six hundred three".