205080666 has 32 divisors (see below), whose sum is σ = 473066880. Its totient is φ = 58055616.

The previous prime is 205080641. The next prime is 205080671. The reversal of 205080666 is 666080502.

205080666 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 15 ways as a sum of consecutive naturals, for example, 17821 + ... + 26976.

It is an arithmetic number, because the mean of its divisors is an integer number (14783340).

Almost surely, 2^205080666 is an apocalyptic number.

205080666 is an abundant number, since it is smaller than the sum of its proper divisors (267986214).

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

205080666 is a wasteful number, since it uses less digits than its factorization.

205080666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44918.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 205080666 is about 14320.6377651276. The cubic root of 205080666 is about 589.7141831177.

The spelling of 205080666 in words is "two hundred five million, eighty thousand, six hundred sixty-six".