66

Famous American highway

Sixty-six, the number between sixty-five and sixty-seven.

Route 66 was the historic American highway connecting Chicago to Los Angeles, celebrated in song and literature as a symbol of westward migration and road-trip culture.

In cards, sixty-six is a trick-taking game popular in German-speaking countries.

route

highway

Major road for travel

desert · neon · signage · asphalt · vintage · landmark · gasoline · drive-in · motorcycle · nostalgic

age

retirement

Leaving the workforce permanently

eligible · milestone · birthday · sixty-six

digit

number

Symbol representing quantity

value · count · sequence · ordinal · single · score · tally · sum · total · amount

proportion

fraction

Part divided by whole

segment · division · part · portion · share · measure

games

bingo

Number-matching game of chance

card · winner · jackpot · draw · pool

mathematics

factorial

Descending multiplication of integers

composite · aliquot · divisibility · combinatorics

Categories
Opposites
mathematical properties

66prime number

Integer with two divisors

61 · 71 · 59 · 73 · 2

digit composition

6665

Number after sixty-four

78 · 34 · 12 · 89

numerical magnitude

660

Numeral for nothing

1 · infinity · zero · 99

Phrases
Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G