206665159 has 2 divisors, whose sum is σ = 206665160. Its totient is φ = 206665158.

The previous prime is 206665087. The next prime is 206665163. The reversal of 206665159 is 951566602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206665159 - 2¹⁷ = 206534087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206660159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103332579 + 103332580.

It is an arithmetic number, because the mean of its divisors is an integer number (103332580).

Almost surely, 2^206665159 is an apocalyptic number.

206665159 is a deficient number, since it is larger than the sum of its proper divisors (1).

206665159 is an equidigital number, since it uses as much as digits as its factorization.

206665159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 206665159 is about 14375.8533311939. The cubic root of 206665159 is about 591.2290371553.

The spelling of 206665159 in words is "two hundred six million, six hundred sixty-five thousand, one hundred fifty-nine".