206685071071 has 2 divisors, whose sum is σ = 206685071072. Its totient is φ = 206685071070.

The previous prime is 206685071029. The next prime is 206685071149. The reversal of 206685071071 is 170170586602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206685071071 - 2¹¹ = 206685069023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206685071011) 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, 103342535535 + 103342535536.

It is an arithmetic number, because the mean of its divisors is an integer number (103342535536).

Almost surely, 2^206685071071 is an apocalyptic number.

206685071071 is a deficient number, since it is larger than the sum of its proper divisors (1).

206685071071 is an equidigital number, since it uses as much as digits as its factorization.

206685071071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 206685071071 in words is "two hundred six billion, six hundred eighty-five million, seventy-one thousand, seventy-one".