206605020566 has 16 divisors (see below), whose sum is σ = 366393140640. Its totient is φ = 85491732480.

The previous prime is 206605020539. The next prime is 206605020571. The reversal of 206605020566 is 665020506602.

206605020566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254439275 + ... + 254440086.

It is an arithmetic number, because the mean of its divisors is an integer number (22899571290).

Almost surely, 2^206605020566 is an apocalyptic number.

206605020566 is a deficient number, since it is larger than the sum of its proper divisors (159788120074).

206605020566 is a wasteful number, since it uses less digits than its factorization.

206605020566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508879399.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 206605020566 in words is "two hundred six billion, six hundred five million, twenty thousand, five hundred sixty-six".