It's about thirty times the number of Escalators in the State of Wyoming.
In other words, the count of Escalators in the State of Wyoming is 0.03 times 66.(2013 figures)
There are only two escalators in the State of Wyoming (although there are apparently plenty of elevators). It is speculated that the lack of escalators is due to the older age of the buildings and the abundance of cheap land resulting in single-story structures. At the time the last count of escalators was made, the state had a population of just 576,000 people.
It's about ten times the number of Living U.S. Presidents.
In other words, the count of Living U.S. Presidents is 0.10 times 66.(a.k.a. Presidents of the United States; a.k.a. Presidents of the United States of America; a.k.a. POTUS), (2016 figures) (including current)
As of this writing, there are five living United States Presidents — President Carter, President Clinton, President Obama, and the two Presidents Bush. At no point in U.S. history have their been more than six (6) living presidents, this circumstance having occurred three times.
It's about seven-and-a-half times the number of Symphonies Composed by Beethoven.
In other words, 66 is 7.333333333330 times the count of Symphonies Composed by Beethoven, and the count of Symphonies Composed by Beethoven is 0.1363636363640 times that amount.(a.k.a. Ludwig van Beethoven)
It's about four-and-a-half times the number of Living Kings and Queens.
In other words, the count of Living Kings and Queens is 0.230 times 66.(2015 figures) (distinct Monarchs)
As of 2015, the world has fifteen Kings and Queens reigning over 45 countries. Of all these, Queen Elizabeth the II is the only reigning Queen; she has monarchical authority over the sixteen of the Commonwealth nations.
It's about two-and-a-half times the number of Countries in the European Union.
In other words, the count of Countries in the European Union is 0.420 times 66.(a.k.a. EU) (2016 figures)
There are 28 member countries in the European Union, the latest member of which is Croatia. The EU is largely urban, with sixteen cities having a population of one million or more, and 75% of the population living in an urban area.
It's about one-and-two-fifths times the number of Teeth in a Great White Shark's Mouth.
In other words, the count of Teeth in a Great White Shark's Mouth is 0.710 times 66.(Carcharodon carcharias) (average; including developing rows)
It's about one-and-one-fifth times the number of Countries in Africa.
In other words, the count of Countries in Africa is 0.830 times 66.(2016 figures) (sovereign states recognized by the UN only)