A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... and 5.5% have someone living alone who is 65 years of age or older. The average household size is 3.04 and the average family size is 3.36. In the town the ...