Rep. John Dingell (D-Mich.) in September 2012. (Carlos Osorio/AP)

On Friday, Rep. John Dingell (D-Mich.) became the longest-serving member of Congress ever, eclipsing the late senator Robert Byrd (D-W.Va.).

To put Dingell's tenure in perspective, here are a few numbers that tell the story:

57, 176: The number of years and days, respectively, that Dingell has served in Congress — all of it in the House

20,997: The number of days that Dingell has served

86: Dingell's age

67: Percentage of his life that Dingell has spent as a member of Congress

24: Percentage of time since the American Revolution that Dingell has served in Congress

11: Number of presidents Dingell has served under, from Dwight Eisenhower to Barack Obama

80: Number of years that a man named John Dingell has represented Dingell's district. Prior to his 57-plus years of service, his father, John Dingell Sr., held the district for more than two decades.

30: Number of elections Dingell has won. He has never lost.

57: The lowest percentage of the vote that Dingell has ever received, in 2010. He failed to crack 60 percent only one other time — during the Republican Revolution in 1994, when he got 59 percent

166 million: The population of the United States when Dingell was first elected in 1955. The population today is nearly double that.

640: The cost, in dollars, of an Air Force toilet seat, according to an investigation Dingell led into wasteful Pentagon contracts. Dingell in the early 1990s was a divisive figure —  somewhat like House Oversight Committee Chairman Darrell Issa (R-Calif.) is today —  known for targeting the powerful.

1: Number of times his family changes its last name. His Polish grandfather changed it from Dzieglewicz to Dingell.

2/11: Dingell's very own holiday, John Dingell Day, lands on Feb. 11, the day he became the longest-serving member of the House in 2009.