A term may comprise a Literal, a constant or a product of literals and a constant. The literals and constant forming a term or product are called ‘Factors’ of the term. Each factor of a term is a ‘Coefficient’ of the product of the rest of the term. In particular, the number of the constant which appears in a term is called the ‘Numerical Coefficient’ of the term and the rest of the term is the ‘Literal Coefficient’ of the term. If a term has no numerical factor, it’s numerical coefficient is 1 and if a term consists only of a constant, it is called the ‘Constant Term’.
In 6a²b, numerical coefficient is = 5, literal coefficient = a²b , coefficient of a²b = 6, coefficient of 6b = a², coefficient of 6a² = b