206649000671 has 2 divisors, whose sum is σ = 206649000672. Its totient is φ = 206649000670.

The previous prime is 206649000601. The next prime is 206649000709. The reversal of 206649000671 is 176000946602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206649000671 - 2¹⁰ = 206648999647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206649000601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103324500335 + 103324500336.

It is an arithmetic number, because the mean of its divisors is an integer number (103324500336).

Almost surely, 2^206649000671 is an apocalyptic number.

206649000671 is a deficient number, since it is larger than the sum of its proper divisors (1).

206649000671 is an equidigital number, since it uses as much as digits as its factorization.

206649000671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 206649000671 in words is "two hundred six billion, six hundred forty-nine million, six hundred seventy-one", and thus it is an aban number.