809934566 has 16 divisors (see below), whose sum is σ = 1392037920. Its totient is φ = 346220160.

The previous prime is 809934511. The next prime is 809934607. The reversal of 809934566 is 665439908.

809934566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 68915 + ... + 79806.

It is an arithmetic number, because the mean of its divisors is an integer number (87002370).

Almost surely, 2^809934566 is an apocalyptic number.

809934566 is a deficient number, since it is larger than the sum of its proper divisors (582103354).

809934566 is a wasteful number, since it uses less digits than its factorization.

809934566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149119.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 809934566 is about 28459.3493600961. The cubic root of 809934566 is about 932.1446500421.

The spelling of 809934566 in words is "eight hundred nine million, nine hundred thirty-four thousand, five hundred sixty-six".