660.69 centimeters is equal to 260.315 inches.
To put this into perspective, here are some comparisons to known objects of similar size:
1. The average height of an adult male in the United States is approximately 177.8 centimeters, or 70 inches. This means that 660.69 centimeters is almost 4 times the height of an average adult male.
2. The wingspan of a bald eagle, the national bird of the United States, can range from 180-230 centimeters, or 71-91 inches. This means that 660.69 centimeters is longer than the wingspan of most bald eagles.
3. A standard door frame is usually around 203.2 centimeters, or 80 inches, tall. This means that 660.69 centimeters is over 3 times the height of a standard door frame.
4. The average length of a school bus is around 12 meters, or 480 inches. This means that 660.69 centimeters is more than half the length of a school bus.
5. The length of a king size bed is typically 203.2 centimeters, or 80 inches. This means that 660.69 centimeters is over 3 times the length of a king size bed.