809366664 has 16 divisors (see below), whose sum is σ = 2023416720. Its totient is φ = 269788880.

The previous prime is 809366647. The next prime is 809366689. The reversal of 809366664 is 466663908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16861782 + ... + 16861829.

It is an arithmetic number, because the mean of its divisors is an integer number (126463545).

Almost surely, 2^809366664 is an apocalyptic number.

It is an amenable number.

809366664 is an abundant number, since it is smaller than the sum of its proper divisors (1214050056).

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

809366664 is a wasteful number, since it uses less digits than its factorization.

809366664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33723620 (or 33723616 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 809366664 is about 28449.3701863503. The cubic root of 809366664 is about 931.9267350784.

The spelling of 809366664 in words is "eight hundred nine million, three hundred sixty-six thousand, six hundred sixty-four".