A composite number is a positive integer that has at least one positive divisor other than one or itself; in other words, it has more than two distinct positive divisors.
Now, let's check each of the provided numbers:
- 67: This number is a prime number because it has no divisors other than 1 and 67.
- 37: This number is also a prime number because it has no divisors other than 1 and 37.
- 47: This number is a prime number because it has no divisors other than 1 and 47.
- 27: This number is a composite number because it can be divided by 1, 3, 9, and 27 (its divisors are 1, 3, 9, and 27).
Therefore, the number classified as composite is 27.