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Quick Answer. The sex ratio is 107 males to 100 females, based on an estimated population of 7.17 billion people as of July 2014. Therefore, there are about 3.7 billion males in the world, and about 9.56 million of them are ages 14 and under. Continue Reading.
Early estimates for the population of the world date to the 17th century: William Petty in 1682 estimated world population at 320 million (modern estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent with modern estimates).