999990000066666 has 96 divisors (see below), whose sum is σ = 2392045722259200. Its totient is φ = 277714284825600.

The previous prime is 999990000066661. The next prime is 999990000066689. The reversal of 999990000066666 is 666660000099999.

999990000066666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

999990000066666 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999990000066661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149794591 + ... + 156327858.

It is an arithmetic number, because the mean of its divisors is an integer number (24917142940200).

Almost surely, 2^{999990000066666} is an apocalyptic number.

999990000066666 is an abundant number, since it is smaller than the sum of its proper divisors (1392055722192534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999990000066666 is a wasteful number, since it uses less digits than its factorization.

999990000066666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306122780 (or 306122773 counting only the distinct ones).

The product of its (nonzero) digits is 459165024, while the sum is 75.

The spelling of 999990000066666 in words is "nine hundred ninety-nine trillion, nine hundred ninety billion, sixty-six thousand, six hundred sixty-six".