5661549 has 8 divisors (see below), whose sum is σ = 8387520. Its totient is φ = 3774348.

The previous prime is 5661547. The next prime is 5661559. The reversal of 5661549 is 9451665.

5661549 is a `hidden beast` number, since 56 + 61 + 549 = 666.

5661549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5661549 - 2¹ = 5661547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661547) 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 7 ways as a sum of consecutive naturals, for example, 104817 + ... + 104870.

It is an arithmetic number, because the mean of its divisors is an integer number (1048440).

Almost surely, 2^5661549 is an apocalyptic number.

It is an amenable number.

5661549 is a deficient number, since it is larger than the sum of its proper divisors (2725971).

5661549 is a wasteful number, since it uses less digits than its factorization.

5661549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209696 (or 209690 counting only the distinct ones).

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

The square root of 5661549 is about 2379.4009750355. The cubic root of 5661549 is about 178.2290217898.

The spelling of 5661549 in words is "five million, six hundred sixty-one thousand, five hundred forty-nine".