It's about the number of Members of Parliament (The U.K.).
(a.k.a. MPs) (2016 figures) (formally "Members of the House of Commons of the Parliament of the United Kingdom of Great Britain and Northern Ireland")
It's about nine-tenths the number of Inductees in the Rock and Roll Hall of Fame.
In other words, 680 is 0.9080 times the count of Inductees in the Rock and Roll Hall of Fame, and the count of Inductees in the Rock and Roll Hall of Fame is 1.10 times that amount.(November, 2015 figures) (including individuals and groups)
It's about nine-tenths the number of Kernels on an Ear of Corn.
In other words, the count of Kernels on an Ear of Corn is 1 times 680.(Corn, a.k.a. Maize; Kernel a.k.a. Seed) (average) (for Dent Corn, a.k.a. field corn)
An average ear of dent corn, the kind grown to feed to animals and to make other foods, has an average of 800 kernels. Each acre of corn yields about 15,900 ears of corn.
It's about four-fifths the number of Population of Vatican City.
In other words, 680 is 0.8080 times the count of Population of Vatican City, and the count of Population of Vatican City is 1.240 times that amount.(a.k.a. Vatican City State, a.k.a. Stato della Città del Vaticano, a.k.a. Status Civitatis Vaticanae) (Rome, Italy) (2014 estimates; permanent residents only)
It's about one-and-three-tenths times the number of Stores in the Mall of America.
In other words, the count of Stores in the Mall of America is 0.770 times 680.(a.k.a. MOA, a.k.a. MoA, a.k.a. Megamall) (Bloomington, Minnesota) (2015 figures) (approximate)
It's about one-and-two-fifths times the number of Olympic Gold Medals Won by the Soviet Union.
In other words, 680 is 1.440 times the count of Olympic Gold Medals Won by the Soviet Union, and the count of Olympic Gold Medals Won by the Soviet Union is 0.6940 times that amount.(a.k.a. Union of Soviet Socialist Republics, a.k.a. USSR, a.k.a. Сою́з Сове́тских Социалисти́ческих Респу́блик, a.k.a. CCCP) (a.k.a. Olympic Games, a.k.a. Jeux olympiques) (Summer and Winter Games grand totals; excluding Russian Federation Medals) (1952 thru 1988 figures)
It's about one-and-nine-tenths times the number of Sesame Seeds on a Big Mac bun.