LXXXVI is the Roman numeral representation of the number 86. In the Roman numeral system, L stands for 50, X for 10, and V for 5. Therefore, LXXXVI is calculated as 50 + 30 + 6, which equals 86. Roman numerals are often used in various contexts, such as in clock faces, book chapters, and movie sequels. The number 86 has significance in various fields, including mathematics and science. For example, in chemistry, the atomic number 86 corresponds to the element Radon, a noble gas. Additionally, in popular culture, "86" can refer to the act of getting rid of something or someone, often used in restaurant slang.