16566065099 has 2 divisors, whose sum is σ = 16566065100. Its totient is φ = 16566065098.

The previous prime is 16566065081. The next prime is 16566065143. The reversal of 16566065099 is 99056066561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16566065099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16566065099.

It is not a weakly prime, because it can be changed into another prime (16566065899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8283032549 + 8283032550.

It is an arithmetic number, because the mean of its divisors is an integer number (8283032550).

Almost surely, 2^16566065099 is an apocalyptic number.

16566065099 is a deficient number, since it is larger than the sum of its proper divisors (1).

16566065099 is an equidigital number, since it uses as much as digits as its factorization.

16566065099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 16566065099 in words is "sixteen billion, five hundred sixty-six million, sixty-five thousand, ninety-nine".