675

675 is a natural number that follows 674 and precedes 676. It is odd and composite. Its prime factorization is 3^3 × 5^2, since 675 = 27 × 25. This factorization yields 12 positive divisors: 1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 225, and 675. Consequently, 675 is divisible by 3 and by 9, and it is a multiple of both 27 and 75.

In various bases, 675 has distinct representations. In binary it is 1010100011_2; in octal it is 1243_8; in hexadecimal it is 0x2A3. In Roman numerals, 675 is written as DCLXXV.

675 also appears in modern notation beyond pure mathematics. The international dialing country code +675 is assigned to Papua New Guinea. In historical calendars, 675 CE denotes a year in the common era and is used in chronology and dating of events in the late ancient to early medieval period. As a number, 675 serves as a typical example of a composite integer with a simple prime factorization that yields a relatively large set of divisors, illustrating common properties of numbers formed by small prime powers.