Number 66 is an integer that follows 65 and precedes 67. It is an even number, meaning it is divisible by 2 without a remainder. In mathematics, 66 can be expressed as the product of its prime factors, which are 2 and 3, specifically 2 \times 3 \times 11. In popular culture, Route 66 is a famous highway in the United States, often referred to as the "Main Street of America." It stretches from Chicago to Santa Monica, covering a distance of about 2,448 miles. The route symbolizes freedom and adventure, making it a popular subject in songs and literature.