6556555 has 4 divisors (see below), whose sum is σ = 7867872. Its totient is φ = 5245240.

The previous prime is 6556519. The next prime is 6556559. The reversal of 6556555 is 5556556.

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

It is not a de Polignac number, because 6556555 - 2¹⁵ = 6523787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6556559) 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, 655651 + ... + 655660.

It is an arithmetic number, because the mean of its divisors is an integer number (1966968).

Almost surely, 2^6556555 is an apocalyptic number.

6556555 is a deficient number, since it is larger than the sum of its proper divisors (1311317).

6556555 is a wasteful number, since it uses less digits than its factorization.

6556555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311316.

The product of its digits is 112500, while the sum is 37.

The square root of 6556555 is about 2560.5770833935. The cubic root of 6556555 is about 187.1652575571.

Subtracting from 6556555 its reverse (5556556), we obtain a palindrome (999999).

The spelling of 6556555 in words is "six million, five hundred fifty-six thousand, five hundred fifty-five".