Obsolete spelling of number

(India, politics) A number assigned to each of the adult citizens and residents of India in order to identify them officially.

(Christianity) The number 666, esoterically regarded as being related to the Beast.

(mathematics) rectangular number

(mathematics) A number which is the product of two consecutive integers

(archaic) second-person singular simple present form of number

plural of clique number

(graph theory) The number of vertices in a maximum clique of a given graph.

(set theory) Any of a sequence of numbers used to represent the cardinality of infinite sets, denoted by the Hebrew letter aleph.

(number theory) A natural number that is abundant but not semiperfect; one for which the sum of the proper divisors (including 1 but not itself) is greater than the number, but no subset of those divisors sums to the number itself.