206100066 has 16 divisors (see below), whose sum is σ = 412509600. Its totient is φ = 68648448.

The previous prime is 206100047. The next prime is 206100113. The reversal of 206100066 is 660001602.

206100066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3736 + ... + 20643.

It is an arithmetic number, because the mean of its divisors is an integer number (25781850).

Almost surely, 2^206100066 is an apocalyptic number.

206100066 is an abundant number, since it is smaller than the sum of its proper divisors (206409534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206100066 is a wasteful number, since it uses less digits than its factorization.

206100066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25793.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 206100066 is about 14356.1856354674. The cubic root of 206100066 is about 590.6896713373.

Adding to 206100066 its reverse (660001602), we get a palindrome (866101668).

The spelling of 206100066 in words is "two hundred six million, one hundred thousand, sixty-six".