8091665 has 4 divisors (see below), whose sum is σ = 9710004. Its totient is φ = 6473328.

The previous prime is 8091617. The next prime is 8091679. The reversal of 8091665 is 5661908.

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 1164241 + 6927424 = 1079^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091665 - 2⁸ = 8091409 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 809162 + ... + 809171.

It is an arithmetic number, because the mean of its divisors is an integer number (2427501).

Almost surely, 2^8091665 is an apocalyptic number.

It is an amenable number.

8091665 is a deficient number, since it is larger than the sum of its proper divisors (1618339).

8091665 is a wasteful number, since it uses less digits than its factorization.

8091665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618338.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 8091665 is about 2844.5852070205. The cubic root of 8091665 is about 200.7609759061.

The spelling of 8091665 in words is "eight million, ninety-one thousand, six hundred sixty-five".