8266609 has 4 divisors (see below), whose sum is σ = 8902516. Its totient is φ = 7630704.

The previous prime is 8266597. The next prime is 8266613. The reversal of 8266609 is 9066628.

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

It can be written as a sum of positive squares in 2 ways, for example, as 960400 + 7306209 = 980^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 8266609 - 2¹⁹ = 7742321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8266109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317934 + ... + 317959.

It is an arithmetic number, because the mean of its divisors is an integer number (2225629).

Almost surely, 2^8266609 is an apocalyptic number.

It is an amenable number.

8266609 is a deficient number, since it is larger than the sum of its proper divisors (635907).

8266609 is a wasteful number, since it uses less digits than its factorization.

8266609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635906.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 8266609 is about 2875.1711253419. The cubic root of 8266609 is about 202.1975080269.

The spelling of 8266609 in words is "eight million, two hundred sixty-six thousand, six hundred nine".