6557443 has 4 divisors (see below), whose sum is σ = 6585120. Its totient is φ = 6529768.

The previous prime is 6557429. The next prime is 6557459. The reversal of 6557443 is 3447556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6557443 - 2¹³ = 6549251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6557399 and 6557408.

It is not an unprimeable number, because it can be changed into a prime (6557423) 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, 13480 + ... + 13957.

It is an arithmetic number, because the mean of its divisors is an integer number (1646280).

Almost surely, 2^6557443 is an apocalyptic number.

6557443 is a deficient number, since it is larger than the sum of its proper divisors (27677).

6557443 is a wasteful number, since it uses less digits than its factorization.

6557443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27676.

The product of its digits is 50400, while the sum is 34.

The square root of 6557443 is about 2560.7504759347. The cubic root of 6557443 is about 187.1737068747.

The spelling of 6557443 in words is "six million, five hundred fifty-seven thousand, four hundred forty-three".