066

066 is a three-digit numeric string that can serve as a number, an identifier, or a code depending on context. It commonly appears in computing as a notation for octal numbers, where a leading zero indicates octal in languages such as C, C++, and Java, as well as in many other environments. In these contexts, 066 denotes the octal value corresponding to decimal 54. This interpretation also underpins octal escape sequences in strings; for example, the sequence \066 represents the ASCII character '6', whose code point is 54.

Beyond programming, 066 is used as an arbitrary code or catalog number in various industries. It may appear as part of product identifiers, model numbers, inventory tags, or reference codes in databases, where the leading zero helps maintain fixed-length fields or align with a specific coding scheme.

In telecommunications and international numbering, a leading zero is often used for domestic dialing trunks, while the country code for Thailand is 66. The string 066 might incidentally appear in dialing plans or internal documentation, but its precise meaning is context-dependent.

Because 066 lacks a single canonical meaning, it is best understood through the field or system in which it appears. See also: octal numeral system, ASCII encoding, product cataloging codes.