999911000116666 has 16 divisors (see below), whose sum is σ = 1663950508670880. Its totient is φ = 446801525475280.

The previous prime is 999911000116571. The next prime is 999911000116667. The reversal of 999911000116666 is 666611000119999.

It is a super-3 number, since 3×999911000116666³ (a number of 46 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

999911000116666 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999911000116598 and 999911000116607.

It is not an unprimeable number, because it can be changed into a prime (999911000116667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385173727561 + ... + 385173730156.

It is an arithmetic number, because the mean of its divisors is an integer number (103996906791930).

Almost surely, 2^{999911000116666} is an apocalyptic number.

999911000116666 is a deficient number, since it is larger than the sum of its proper divisors (664039508554214).

999911000116666 is a wasteful number, since it uses less digits than its factorization.

999911000116666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770347457789.

The product of its (nonzero) digits is 8503056, while the sum is 64.

The spelling of 999911000116666 in words is "nine hundred ninety-nine trillion, nine hundred eleven billion, one hundred sixteen thousand, six hundred sixty-six".