206666314162699 has 2 divisors, whose sum is σ = 206666314162700. Its totient is φ = 206666314162698.

The previous prime is 206666314162621. The next prime is 206666314162801. The reversal of 206666314162699 is 996261413666602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206666314162699 - 2²¹ = 206666312065547 is a prime.

It is not a weakly prime, because it can be changed into another prime (206666314169699) 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, 103333157081349 + 103333157081350.

It is an arithmetic number, because the mean of its divisors is an integer number (103333157081350).

Almost surely, 2^{206666314162699} is an apocalyptic number.

206666314162699 is a deficient number, since it is larger than the sum of its proper divisors (1).

206666314162699 is an equidigital number, since it uses as much as digits as its factorization.

206666314162699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181398528, while the sum is 67.

The spelling of 206666314162699 in words is "two hundred six trillion, six hundred sixty-six billion, three hundred fourteen million, one hundred sixty-two thousand, six hundred ninety-nine".