From COVID-19 to carbon emissions: King Charles III in numbers

The number of times King Charles III contracted coronavirus. He spent a week isolating after first testing positive in March 2020. In February this year he tested positive again but showed no symptoms.

Age at which Charles became first in line to the throne after his grandfather, King George VI, died in 1952 and his mother became Queen Elizabeth II.

The number of years Charles has owned his venerable Aston Martin DB6 convertible, which he converted in 2008 to run on bioethanol made from wine and cheese. 

The number of years a clothing company in Worcester, central England, had to wait to be repaid the £453.15 ($527 in today's money) in debt run up by King Charles II in the 17th century for army uniforms. 

The prince who became Charles III on Thursday paid the money back in 2008, minus the interest.

The number of people who have benefitted to date from the Prince's Trust, which Charles set up in 1976 with his Royal Navy severance pay to help youngsters from disadvantaged areas.

It is also the amount of the donation towards his charity that Charles reportedly accepted from the family of 9/11 mastermind Osama bin Laden in 2013.

The number of followers Charles and Camilla have on Instagram. By comparison, Prince William and Kate, the Duke and Duchess of Cornwall and Cambridge, have 13.9 million.