6556667 has 4 divisors (see below), whose sum is σ = 7061040. Its totient is φ = 6052296.

The previous prime is 6556657. The next prime is 6556673. The reversal of 6556667 is 7666556.

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 6556667 - 2⁴ = 6556651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6556607) 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 3 ways as a sum of consecutive naturals, for example, 252167 + ... + 252192.

It is an arithmetic number, because the mean of its divisors is an integer number (1765260).

Almost surely, 2^6556667 is an apocalyptic number.

6556667 is a deficient number, since it is larger than the sum of its proper divisors (504373).

6556667 is a wasteful number, since it uses less digits than its factorization.

6556667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504372.

The product of its digits is 226800, while the sum is 41.

The square root of 6556667 is about 2560.5989533701. The cubic root of 6556667 is about 187.1663232788.

The spelling of 6556667 in words is "six million, five hundred fifty-six thousand, six hundred sixty-seven".