999966000996666 has 96 divisors (see below), whose sum is σ = 2439851091724800. Its totient is φ = 293238990028800.

The previous prime is 999966000996649. The next prime is 999966000996791. The reversal of 999966000996666 is 666699000669999.

999966000996666 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294118410 + ... + 297498858.

It is an arithmetic number, because the mean of its divisors is an integer number (25415115538800).

Almost surely, 2^{999966000996666} is an apocalyptic number.

999966000996666 is an abundant number, since it is smaller than the sum of its proper divisors (1439885090728134).

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

999966000996666 is a wasteful number, since it uses less digits than its factorization.

999966000996666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428692 (or 3428689 counting only the distinct ones).

The product of its (nonzero) digits is 24794911296, while the sum is 90.

The spelling of 999966000996666 in words is "nine hundred ninety-nine trillion, nine hundred sixty-six billion, nine hundred ninety-six thousand, six hundred sixty-six".