647.66 centimeters is equivalent to 255.38583 inches.
To give some comparisons, the average height of a person is around 63 inches, so 647.66 centimeters is approximately 4 times taller.
The length of a standard skateboard deck is around 31 inches, so 647.66 centimeters is roughly 8 times longer.
A football field is about 360 feet long, which is equivalent to 109.728 meters or 10,972.8 centimeters. Therefore, 647.66 centimeters is about 1/17th the length of a football field.
The height of the Statue of Liberty from the base to the tip of the torch is 305 feet, which is equal to 9,509.2 centimeters. Thus, 647.66 centimeters is a little over 12% of the height of the Statue of Liberty.