It is a sphenic number, since it is the product of 3 distinct primes.
99988666 is a strobogrammatic number because it is the same when read upside-down.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is an unprimeable number.
Almost surely, 299988666 is an apocalyptic number.
99988666 is a wasteful number, since it uses less digits than its factorization.
99988666 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 77216.
The square root of 99988666 is about 9999.4332839416. The cubic root of 99988666 is about 464.1413467761.
The spelling of 99988666 in words is "ninety-nine million, nine hundred eighty-eight thousand, six hundred sixty-six".