5661003 has 16 divisors (see below), whose sum is σ = 8064000. Its totient is φ = 3524640.

The previous prime is 5661001. The next prime is 5661041. The reversal of 5661003 is 3001665.

It is not a de Polignac number, because 5661003 - 2¹ = 5661001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1648 + ... + 3746.

It is an arithmetic number, because the mean of its divisors is an integer number (504000).

Almost surely, 2^5661003 is an apocalyptic number.

5661003 is a deficient number, since it is larger than the sum of its proper divisors (2402997).

5661003 is a wasteful number, since it uses less digits than its factorization.

5661003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 5661003 is about 2379.2862375091. The cubic root of 5661003 is about 178.2232921344.

Adding to 5661003 its reverse (3001665), we get a palindrome (8662668).

The spelling of 5661003 in words is "five million, six hundred sixty-one thousand, three".