5665869 has 20 divisors (see below), whose sum is σ = 9234720. Its totient is φ = 3433320.

The previous prime is 5665853. The next prime is 5665883. The reversal of 5665869 is 9685665.

5665869 is a `hidden beast` number, since 5 + 66 + 586 + 9 = 666.

It is not a de Polignac number, because 5665869 - 2⁴ = 5665853 is a prime.

It is a super-2 number, since 2×5665869² = 64204143050322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665069) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2289 + ... + 4070.

It is an arithmetic number, because the mean of its divisors is an integer number (461736).

Almost surely, 2^5665869 is an apocalyptic number.

It is an amenable number.

5665869 is a deficient number, since it is larger than the sum of its proper divisors (3568851).

5665869 is a wasteful number, since it uses less digits than its factorization.

5665869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382 (or 6373 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 5665869 is about 2380.3085934391. The cubic root of 5665869 is about 178.2743423444.

The spelling of 5665869 in words is "five million, six hundred sixty-five thousand, eight hundred sixty-nine".