6556556 has 12 divisors (see below), whose sum is σ = 11754120. Its totient is φ = 3198240.

The previous prime is 6556519. The next prime is 6556559.

It is a happy number.

6556556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6556556² = 85976853162272, which contains 22 as substring.

It is a congruent 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, 19826 + ... + 20153.

It is an arithmetic number, because the mean of its divisors is an integer number (979510).

Almost surely, 2^6556556 is an apocalyptic number.

It is an amenable number.

6556556 is a deficient number, since it is larger than the sum of its proper divisors (5197564).

6556556 is a wasteful number, since it uses less digits than its factorization.

6556556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40024 (or 40022 counting only the distinct ones).

The product of its digits is 135000, while the sum is 38.

The square root of 6556556 is about 2560.5772786620. The cubic root of 6556556 is about 187.1652670725.

The spelling of 6556556 in words is "six million, five hundred fifty-six thousand, five hundred fifty-six".