206866683349 has 2 divisors, whose sum is σ = 206866683350. Its totient is φ = 206866683348.

The previous prime is 206866683347. The next prime is 206866683469. The reversal of 206866683349 is 943386668602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198041020324 + 8825663025 = 445018^2 + 93945^2 .

It is a cyclic number.

It is not a de Polignac number, because 206866683349 - 2¹ = 206866683347 is a prime.

Together with 206866683347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206866683341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103433341674 + 103433341675.

It is an arithmetic number, because the mean of its divisors is an integer number (103433341675).

Almost surely, 2^206866683349 is an apocalyptic number.

It is an amenable number.

206866683349 is a deficient number, since it is larger than the sum of its proper divisors (1).

206866683349 is an equidigital number, since it uses as much as digits as its factorization.

206866683349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53747712, while the sum is 61.

The spelling of 206866683349 in words is "two hundred six billion, eight hundred sixty-six million, six hundred eighty-three thousand, three hundred forty-nine".