8105665 has 4 divisors (see below), whose sum is σ = 9726804. Its totient is φ = 6484528.

The previous prime is 8105653. The next prime is 8105677. The reversal of 8105665 is 5665018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5665018 = 2 ⋅2832509.

It is an interprime number because it is at equal distance from previous prime (8105653) and next prime (8105677).

It can be written as a sum of positive squares in 2 ways, for example, as 2961841 + 5143824 = 1721^2 + 2268^2 .

It is a cyclic number.

It is not a de Polignac number, because 8105665 - 2⁵ = 8105633 is a prime.

It is a Duffinian 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, 810562 + ... + 810571.

It is an arithmetic number, because the mean of its divisors is an integer number (2431701).

Almost surely, 2^8105665 is an apocalyptic number.

It is an amenable number.

8105665 is a deficient number, since it is larger than the sum of its proper divisors (1621139).

8105665 is a wasteful number, since it uses less digits than its factorization.

8105665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621138.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 8105665 is about 2847.0449592516. The cubic root of 8105665 is about 200.8766930976.

The spelling of 8105665 in words is "eight million, one hundred five thousand, six hundred sixty-five".