5665491 has 16 divisors (see below), whose sum is σ = 9039520. Its totient is φ = 3486240.

The previous prime is 5665483. The next prime is 5665507. The reversal of 5665491 is 1945665.

5665491 is a `hidden beast` number, since 566 + 5 + 4 + 91 = 666.

It is not a de Polignac number, because 5665491 - 2³ = 5665483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5665441) 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 15 ways as a sum of consecutive naturals, for example, 7720 + ... + 8421.

It is an arithmetic number, because the mean of its divisors is an integer number (564970).

Almost surely, 2^5665491 is an apocalyptic number.

5665491 is a deficient number, since it is larger than the sum of its proper divisors (3374029).

5665491 is a wasteful number, since it uses less digits than its factorization.

5665491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163 (or 16157 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 5665491 is about 2380.2291906453. The cubic root of 5665491 is about 178.2703777158.

The spelling of 5665491 in words is "five million, six hundred sixty-five thousand, four hundred ninety-one".