8066809 has 4 divisors (see below), whose sum is σ = 8074404. Its totient is φ = 8059216.

The previous prime is 8066797. The next prime is 8066827. The reversal of 8066809 is 9086608.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4826809 + 3240000 = 2197^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 8066809 - 2¹¹ = 8064761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8066879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882 + ... + 4435.

It is an arithmetic number, because the mean of its divisors is an integer number (2018601).

Almost surely, 2^8066809 is an apocalyptic number.

It is an amenable number.

8066809 is a deficient number, since it is larger than the sum of its proper divisors (7595).

8066809 is a wasteful number, since it uses less digits than its factorization.

8066809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 8066809 is about 2840.2128441369. The cubic root of 8066809 is about 200.5551990108. Note that the first 3 decimals are identical.

The spelling of 8066809 in words is "eight million, sixty-six thousand, eight hundred nine".