809066 has 4 divisors (see below), whose sum is σ = 1213602. Its totient is φ = 404532.

The previous prime is 809063. The next prime is 809087. The reversal of 809066 is 660908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 483025 + 326041 = 695^2 + 571^2 .

It is not an unprimeable number, because it can be changed into a prime (809063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202265 + ... + 202268.

2⁸⁰⁹⁰⁶⁶ is an apocalyptic number.

809066 is a deficient number, since it is larger than the sum of its proper divisors (404536).

809066 is a wasteful number, since it uses less digits than its factorization.

809066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404535.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 809066 is about 899.4809614439. The cubic root of 809066 is about 93.1811323224.

The spelling of 809066 in words is "eight hundred nine thousand, sixty-six".