206566435044611 has 2 divisors, whose sum is σ = 206566435044612. Its totient is φ = 206566435044610.

The previous prime is 206566435044583. The next prime is 206566435044631. The reversal of 206566435044611 is 116440534665602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206566435044611 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (206566435044631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103283217522305 + 103283217522306.

It is an arithmetic number, because the mean of its divisors is an integer number (103283217522306).

Almost surely, 2^{206566435044611} is an apocalyptic number.

206566435044611 is a deficient number, since it is larger than the sum of its proper divisors (1).

206566435044611 is an equidigital number, since it uses as much as digits as its factorization.

206566435044611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 206566435044611 in words is "two hundred six trillion, five hundred sixty-six billion, four hundred thirty-five million, forty-four thousand, six hundred eleven".