0664

0664 is a four-digit sequence that can denote different things depending on context. In standard decimal notation, it can be read as the integer 664, which lies between 663 and 665.

In mathematics and numerals, the decimal number 664 factors as 2^3 × 83; it is even and composite. Its binary representation is 1010011000, and its hexadecimal form is 0x298. In octal notation, the literal 0664 (with a leading zero) denotes the decimal value 436 in languages that treat leading zeros as octal.

In computing and programming, the interpretation of a number with a leading zero varies by language. In many C-family languages, a numeric literal that begins with a leading zero is interpreted as octal, so 0664 equals decimal 436. In Python, older syntax allowed 0664 as octal, but modern Python requires 0o664 to denote octal.

Calendrical use: as a year, 664 CE sits in the 7th century, a period with various regional developments across empires, though the specific events are not described here.

Other uses: 0664 can appear as a code, identifier, or part number in catalogs, telecommunications routing, or internal systems. Its meaning is not fixed and depends on the surrounding schema or context.