5665671 has 24 divisors (see below), whose sum is σ = 9010560. Its totient is φ = 3402000.

The previous prime is 5665661. The next prime is 5665687. The reversal of 5665671 is 1765665.

It is a happy number.

It is not a de Polignac number, because 5665671 - 2⁹ = 5665159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665601) 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 23 ways as a sum of consecutive naturals, for example, 14760 + ... + 15138.

It is an arithmetic number, because the mean of its divisors is an integer number (375440).

Almost surely, 2^5665671 is an apocalyptic number.

5665671 is a deficient number, since it is larger than the sum of its proper divisors (3344889).

5665671 is a wasteful number, since it uses less digits than its factorization.

5665671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 544 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 5665671 is about 2380.2670018298. The cubic root of 5665671 is about 178.2722656562.

It can be divided in two parts, 5665 and 671, that added together give a palindrome (6336).

The spelling of 5665671 in words is "five million, six hundred sixty-five thousand, six hundred seventy-one".