"According to SSA historians, the social security program began with the Social Security Act of 1935, originally titled the Economic Security Act. The term "Social Security" was coined in the United States by activist Abraham Epstein, who led a group called the American Association for Social Security."
https://people.howstuffworks.com/social-security-number5.htm
6+6+6 = 1+8 = 9, the digits of your number. What are the odds, if I may borrow Q's phrase?
You DO realize that I have that copyrighted?! 😁 {see #'s 6 & 18}