I want the persons steam id to be hexed, it should look something like this: 110000133d55faa. I'm using javascript and i have writen like this:

let num = 76561198829887402;
console.log(num.toString(16));

The hex I'm getting is 110000133d55fb0. So the 2 last chars is wrong i want to get 110000133d55faa but getting 110000133d55fb0.