17

Traits of 17

 * 7th smallest prime number
 * Supposedly the "least random number"
 * 2² + 3² + 5² + 7² + 11² + 13² + 17² = 666

Examples of 17

 * One of the cicada cycles.
 * The atomic number of chlorine
 * 17 muscles in the tongue.
 * Pearl Harbor was attacked by 17 Japanese squadrons.