As a person
Born on the 16th, or a 16/7 life path: a 7 with sudden reversals.
What is built on weak ground falls. Build carefully.
11 plus 5 make 16, and so do 8 plus 8. That is why two 8s clash.
As a day
The 16th, or a 16/7 day, is a 7 day: rest and study, no weddings.
As a year
A 16/7 year is a 7 year: learn, and build nothing on shaky ground.
Friends and enemies
As a 7. Friends: 11, the best match, then 1. 7 with 7 is strong with space.
As a 7. Enemy: 8. A 9 is destructive for a 7, and 3 with 7 is a frenemy pair.
Enemy numbers
Handle with care
Compounds
1+6 = 7, so 16 reads as a 7. Every 7 line applies to it.
The 1 and the 6 give the 7 a habit of sudden turns.