LXXV, or seventy-five, is a numeral represented by the Roman numeral "LXXV." It is composed of the symbols "L" for fifty, "XX" for twenty, and "V" for five. In the decimal system, seventy-five is a composite number, meaning it has factors other than one and itself, specifically 3, 5, 15, and 25. In various contexts, seventy-five can signify milestones, such as anniversaries or birthdays. For example, a 75th anniversary is often celebrated with special events and gifts. Additionally, in mathematics, seventy-five can be used in calculations, statistics, and as a reference point in various applications.