the classical guitar has 6 strings

"Number Seventy-Five" is a 2013 suspence novel by Ashley Fontainne about a woman that after the demise of her marriage is persuaded into joining an online dating site

astronaut Christa McAuliffe died in a spaceship explosion at 37

Selfie 69 is a 2016 romantic comedy about some friends who ask themselves "who gets married first in three days?"

-40 is the only temperature at which Fahrenheit and Celsius scales correspond, i.e., −40 °F = −40 °C

the base of the Great Pyramid of Giza, also known as Pyramid of Cheops, is a square of side 756 ft

lion's mane jellyfish is the largest known species of jellyfish. One specimen washed up on the shore of Massachusetts Bay in 1870 had tentacles 37m long

Rakett 69 is an Estonian science competition TV show that in 2012 has been elected the best educational TV show in Europe

the highest number ever counted to on Sesame Street