5666865 has 32 divisors (see below), whose sum is σ = 9766656. Its totient is φ = 2795520.

The previous prime is 5666849. The next prime is 5666873. The reversal of 5666865 is 5686665.

It is not a de Polignac number, because 5666865 - 2⁴ = 5666849 is a prime.

It is a super-2 number, since 2×5666865² = 64226717856450, which contains 22 as substring.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 17949 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (305208).

Almost surely, 2^5666865 is an apocalyptic number.

It is an amenable number.

5666865 is a deficient number, since it is larger than the sum of its proper divisors (4099791).

5666865 is a wasteful number, since it uses less digits than its factorization.

5666865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its digits is 259200, while the sum is 42.

The square root of 5666865 is about 2380.5178008156. The cubic root of 5666865 is about 178.2847879820.

The spelling of 5666865 in words is "five million, six hundred sixty-six thousand, eight hundred sixty-five".