5665871 has 4 divisors (see below), whose sum is σ = 5745744. Its totient is φ = 5586000.

The previous prime is 5665853. The next prime is 5665883. The reversal of 5665871 is 1785665.

5665871 = 125² + 126² + ... + 266².

It is a happy number.

5665871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5665871 - 2¹⁴ = 5649487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39830 + ... + 39971.

It is an arithmetic number, because the mean of its divisors is an integer number (1436436).

Almost surely, 2^5665871 is an apocalyptic number.

5665871 is a deficient number, since it is larger than the sum of its proper divisors (79873).

5665871 is an equidigital number, since it uses as much as digits as its factorization.

5665871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79872.

The product of its digits is 50400, while the sum is 38.

The square root of 5665871 is about 2380.3090135527. The cubic root of 5665871 is about 178.2743633209.

The spelling of 5665871 in words is "five million, six hundred sixty-five thousand, eight hundred seventy-one".