6556678 has 4 divisors (see below), whose sum is σ = 9835020. Its totient is φ = 3278338.

The previous prime is 6556673. The next prime is 6556699. The reversal of 6556678 is 8766556.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1639168 + ... + 1639171.

It is an arithmetic number, because the mean of its divisors is an integer number (2458755).

Almost surely, 2^6556678 is an apocalyptic number.

6556678 is a deficient number, since it is larger than the sum of its proper divisors (3278342).

6556678 is a wasteful number, since it uses less digits than its factorization.

6556678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278341.

The product of its digits is 302400, while the sum is 43.

The square root of 6556678 is about 2560.6011013041. The cubic root of 6556678 is about 187.1664279473.

The spelling of 6556678 in words is "six million, five hundred fifty-six thousand, six hundred seventy-eight".