665204066 has 32 divisors (see below), whose sum is σ = 1049241600. Its totient is φ = 315974736.

The previous prime is 665204047. The next prime is 665204077. The reversal of 665204066 is 660402566.

665204066 is digitally balanced in base 2, 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, 803945 + ... + 804771.

It is an arithmetic number, because the mean of its divisors is an integer number (32788800).

Almost surely, 2^665204066 is an apocalyptic number.

665204066 is a deficient number, since it is larger than the sum of its proper divisors (384037534).

665204066 is a wasteful number, since it uses less digits than its factorization.

665204066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 665204066 is about 25791.5502829900. The cubic root of 665204066 is about 872.9411472900.

The spelling of 665204066 in words is "six hundred sixty-five million, two hundred four thousand, sixty-six".