5665865 has 4 divisors (see below), whose sum is σ = 6799044. Its totient is φ = 4532688.

The previous prime is 5665853. The next prime is 5665883. The reversal of 5665865 is 5685665.

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 4206601 + 1459264 = 2051^2 + 1208^2 .

It is a cyclic number.

It is not a de Polignac number, because 5665865 - 2⁸ = 5665609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566582 + ... + 566591.

It is an arithmetic number, because the mean of its divisors is an integer number (1699761).

Almost surely, 2^5665865 is an apocalyptic number.

It is an amenable number.

5665865 is a deficient number, since it is larger than the sum of its proper divisors (1133179).

5665865 is a wasteful number, since it uses less digits than its factorization.

5665865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133178.

The product of its digits is 216000, while the sum is 41.

The square root of 5665865 is about 2380.3077532118. The cubic root of 5665865 is about 178.2743003916.

The spelling of 5665865 in words is "five million, six hundred sixty-five thousand, eight hundred sixty-five".