The number 64 is classified as a composite number because it has more than two positive divisors. Specifically, its divisors include 1, 2, 4, 8, 16, 32, and 64 itself. This means that 64 can be divided evenly by these numbers, unlike prime numbers, which have only two divisors: 1 and the number itself. In addition to being composite, 64 is also a perfect square, as it can be expressed as 8 multiplied by itself (8 × 8 = 64). This property makes it significant in various mathematical contexts, including geometry and number theory, where perfect squares are often studied for their unique characteristics.