8366665 has 8 divisors (see below), whose sum is σ = 10285128. Its totient is φ = 6529920.

The previous prime is 8366663. The next prime is 8366681. The reversal of 8366665 is 5666638.

8366665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1375929 + 6990736 = 1173^2 + 2644^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8366665 - 2¹ = 8366663 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8366663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20202 + ... + 20611.

It is an arithmetic number, because the mean of its divisors is an integer number (1285641).

Almost surely, 2^8366665 is an apocalyptic number.

It is an amenable number.

8366665 is a deficient number, since it is larger than the sum of its proper divisors (1918463).

8366665 is a wasteful number, since it uses less digits than its factorization.

8366665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40859.

The product of its digits is 155520, while the sum is 40.

The square root of 8366665 is about 2892.5187985560. The cubic root of 8366665 is about 203.0100134998.

The spelling of 8366665 in words is "eight million, three hundred sixty-six thousand, six hundred sixty-five".