206066216564 has 12 divisors (see below), whose sum is σ = 388355562084. Its totient is φ = 95107484544.

The previous prime is 206066216563. The next prime is 206066216569. The reversal of 206066216564 is 465612660602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86225624164 + 119840592400 = 293642^2 + 346180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206066216561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1981405877 + ... + 1981405980.

It is an arithmetic number, because the mean of its divisors is an integer number (32362963507).

Almost surely, 2^206066216564 is an apocalyptic number.

It is an amenable number.

206066216564 is a deficient number, since it is larger than the sum of its proper divisors (182289345520).

206066216564 is a wasteful number, since it uses less digits than its factorization.

206066216564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962811874 (or 3962811872 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 206066216564 in words is "two hundred six billion, sixty-six million, two hundred sixteen thousand, five hundred sixty-four".