5531661 has 12 divisors (see below), whose sum is σ = 8337888. Its totient is φ = 3527304.

The previous prime is 5531657. The next prime is 5531677. The reversal of 5531661 is 1661355.

It is a happy number.

It is not a de Polignac number, because 5531661 - 2² = 5531657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5531621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13155 + ... + 13568.

It is an arithmetic number, because the mean of its divisors is an integer number (694824).

Almost surely, 2^5531661 is an apocalyptic number.

It is an amenable number.

5531661 is a deficient number, since it is larger than the sum of its proper divisors (2806227).

5531661 is a wasteful number, since it uses less digits than its factorization.

5531661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26752 (or 26749 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 5531661 is about 2351.9483412694. The cubic root of 5531661 is about 176.8554790811.

The spelling of 5531661 in words is "five million, five hundred thirty-one thousand, six hundred sixty-one".