775

775 (seven hundred seventy-five) is a natural number that comes after 774 and before 776. In mathematics, it is an odd composite number with prime factorization 5^2 × 31; its divisors are 1, 5, 25, 31, 155, and 775. The sum of its proper divisors is 217, so 775 is a deficient number. It is congruent to 7 modulo 8 and 3 modulo 4. Representations: in binary 1100000111, in hexadecimal 0x307, in octal 01407, and in Roman numerals DCCLXXV.

In telecommunications and computing, 775 is used as an area code for western Nevada, including Reno and Carson City. In computer hardware, the designation LGA 775 refers to a CPU socket used by Intel for desktop processors.

As a calendar year, 775 CE denotes a year in the early medieval period in the Julian calendar. The year is used in historical chronology to place events within the 8th century.