6556543 has 18 divisors (see below), whose sum is σ = 8119536. Its totient is φ = 5277888.

The previous prime is 6556519. The next prime is 6556559. The reversal of 6556543 is 3456556.

6556543 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 6556543 - 2⁹ = 6556031 is a prime.

It is a super-2 number, since 2×6556543² = 85976512221698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6556499 and 6556508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556513) 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 17 ways as a sum of consecutive naturals, for example, 13930 + ... + 14392.

Almost surely, 2^6556543 is an apocalyptic number.

6556543 is a deficient number, since it is larger than the sum of its proper divisors (1562993).

6556543 is a wasteful number, since it uses less digits than its factorization.

6556543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 487 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

The square root of 6556543 is about 2560.5747401707. The cubic root of 6556543 is about 187.1651433719.

The spelling of 6556543 in words is "six million, five hundred fifty-six thousand, five hundred forty-three".