The Number 66: Properties and MeaningsPrime Factors of 66=2x3x11.
66 is a Triangular Number.
66 is a Hexagonal Number.
66 is a 23-gonal Number.
66 is an Abundant Number.
66 is the number of 8-iamonds.
The Chemical Element Dysprosium has an atomic number of 66.
The Year 66 ADIn the year 66 AD "Halley's Comet" visited the Earth.
In the 66 AD a small group of Jewish extremists called Sicarii took over the mountaintop at the start of the Jewish revolt against the Roman Empire.