267

267 is a natural number that comes after 266 and before 268. It is an odd, composite number with prime factorization 3 × 89. The positive divisors are 1, 3, 89, and 267; the sum of the proper divisors is 93, which is less than 267, so 267 is a deficient number.

267 is equal to 3 × 89, making it the product of two primes and thus a semiprime. It is divisible by 3 (sum of digits 2+6+7 = 15), but not by 5 or 7. In base representations, 267 is 100001011 in binary and 0x10B in hexadecimal; in Roman numerals it is CCLXVII. The Euler totient function gives φ(267) = (3 − 1)(89 − 1) = 176.

In calendar terms, 267 can denote the year AD 267 or 267 BCE in historical timelines. The year 267 CE falls within the Crisis of the Third Century in the Roman Empire, a period marked by military and political turmoil.

Area code 267 serves the Philadelphia metropolitan area in Pennsylvania, United States, and is used as an overlay with 215 and 445.

In Unicode, the code point U+010B corresponds to the Latin small letter c with dot above, ċ.