Specifier for atomic

What is the printf specifier for atomic_uint_fast64_t type? I tried

#include <inttypes.h>
std::atomic_uint_fast64_t number(98);
printf("%" PRId64 "\n", number);

But I got an error:

error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’
     printf("%" PRId64 "\n", number);