5581669 has 4 divisors (see below), whose sum is σ = 5590944. Its totient is φ = 5572396.

The previous prime is 5581651. The next prime is 5581679. The reversal of 5581669 is 9661855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5581669 - 2⁵ = 5581637 is a prime.

It is a super-2 number, since 2×5581669² = 62310057651122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3667 + ... + 4960.

It is an arithmetic number, because the mean of its divisors is an integer number (1397736).

Almost surely, 2^5581669 is an apocalyptic number.

It is an amenable number.

5581669 is a deficient number, since it is larger than the sum of its proper divisors (9275).

5581669 is an equidigital number, since it uses as much as digits as its factorization.

5581669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274.

The product of its digits is 64800, while the sum is 40.

The square root of 5581669 is about 2362.5556078112. Note that the first 3 decimals coincide. The cubic root of 5581669 is about 177.3868246336.

The spelling of 5581669 in words is "five million, five hundred eighty-one thousand, six hundred sixty-nine".