The phrase "a number of exceptionally" is correct and usable in written English.
It can be used to describe a quantity of items or people that are notably high in quality or performance.
Example: "There are a number of exceptionally talented musicians in our community who deserve recognition."
Alternatives: "several remarkably" or "many outstanding".
"There are a number of exceptionally capable executives serving on the HSBC board.
A local reporter kept count of the number of shots after a number of exceptionally long rallies.
"We're in the fortunate position of being able to talk to a number of exceptionally high quality candidates to replace Sarah.
A number of exceptionally literate thrillers have arrived this year from abroad, including Stieg Larsson's "The Girl With the Dragon Tattoo," Jonathan Barnes's "The Somnambulist," Frank Tallis's "Vienna Blood" and Michael Cox's "The Glass of Time". Lewis's "Bad Traffic" ranks with the best of them.
But several remote archaeological sites do have rich grave goods -- particularly a number of exceptionally preserved ancient horses and their furnishings.
UKIP leader Nigel Farage said: "UKIP are putting forward a number of exceptionally high-calibre candidates for the 2014 European elections which we are hoping to win.
For a number of years, exceptionally well-preserved fossils of birds and nonavian theropod dinosaurs from China had demonstrated the presence and structure of fossil feathers; however, the determination of colour in such feathers had been elusive.
The terms of political debate are, in large part, dictated by a media controlled by a small number of exceptionally rich owners, while thinktanks and political parties are funded by wealthy individuals and corporate interests.
The terms of political debate are, in large part, dictated by a media controlled by a small number of exceptionally rich owners, while thinktanks and political parties are funded by wealthy individuals and corporate interests.
In the southern province of Guiyang there is a small number of exceptionally remote villages of the Miao tribe where the women wear extraordinary woollen headpieces that were traditionally made from the hair of their ancestors – in remembrance.
But there is a small number of exceptionally well-heeled customers out there Arab princes, Russian oligarchs, rock stars and corporate tycoons who will pay a price, sometimes fantastic prices, to get the look they want.
