If you pay payroll or Social Security taxes, then some of the debt is owed to you.
The Social Security Trust Fund is loaned to the government. The Sec. of the Treasury is responsible for safeguarding it.
The Republicans spent a lot of money on war and tax cuts for the rich and do not want to have to pay the money back to the Social Security Trust Fund (or other creditors). That is why Republicans are at the same time so down on Social Security and the national debt.
Our Constitution grants to the Congress the authority to issue our money. The Fed is in that respect just an agent of the Congress. The US dollar was not created by God on the 8th day. It is created by our government.
Currencies come and go. Trade and business stay.
Don't worry about repaying the debt so much. Worry about how you will survive when you can no longer work if Wall Street grabs your personal savings and the Republicans destroy your Social Security.
The whole national debt hysteria is just a red herring.