206771664806 has 64 divisors (see below), whose sum is σ = 367750800000. Its totient is φ = 87145833600.

The previous prime is 206771664797. The next prime is 206771664811. The reversal of 206771664806 is 608466177602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10313600 + ... + 10333628.

It is an arithmetic number, because the mean of its divisors is an integer number (5746106250).

Almost surely, 2^206771664806 is an apocalyptic number.

206771664806 is a deficient number, since it is larger than the sum of its proper divisors (160979135194).

206771664806 is a wasteful number, since it uses less digits than its factorization.

206771664806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20302 (or 20288 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 206771664806 in words is "two hundred six billion, seven hundred seventy-one million, six hundred sixty-four thousand, eight hundred six".