077

077 is a three-digit sequence that can carry different meanings depending on context. In mathematics, 077 is equal to 77 in decimal notation. In computing, a leading zero often signals an octal (base-8) representation in older programming languages; 077 in octal equals 63 in decimal. In modern environments like Python 3, leading zeros do not denote octal literals, which are written as 0o77.

In telecommunications, 077 is a prefix used in the United Kingdom for mobile telephone numbers. Numbers beginning with 077 are typically 11 digits long and are part of the broader 07 mobile number range. The use of 07 prefixes identifies mobile services in UK numbering.

In other uses, 077 can appear as an identifier in product codes, model numbers, or catalog entries. Without additional context, it does not refer to a single standardized meaning. It may also be encountered as a year form in historical dating or as part of numbering schemes in various domains.