What is 80?

• The number 80 is an even composite number, meaning it can be evenly divided by 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80.
• In Roman numerals, 80 is represented as LXXX.
• In mathematics, 80 is a Harshad number, which means it is divisible by the sum of its digits (8 + 0 = 8, and 80 ÷ 8 = 10).
• 80 is the atomic number of mercury, a heavy metal element that is commonly used in thermometers, barometers, and other scientific instruments.
• 80 is the standard TCP port number used for HTTP (Hypertext Transfer Protocol) connections on the internet.
• There are 80 books in the King James Version of the Bible.
• In Fahrenheit, 80 degrees is considered a warm temperature, while in Celsius, it is 26.7 degrees.
• 80 can be represented as the sum of two squares: 4^2 + 8^2 = 80.