999999000666666 has 192 divisors, whose sum is σ = 2987712003983616. Its totient is φ = 233280000000000.

The previous prime is 999999000666559. The next prime is 999999000666707. The reversal of 999999000666666 is 666666000999999.

It is a super-2 number, since 2×999999000666666² (a number of 31 digits) contains 22 as substring.

999999000666666 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 95 ways as a sum of consecutive naturals, for example, 749333335 + ... + 750666666.

It is an arithmetic number, because the mean of its divisors is an integer number (15561000020748).

Almost surely, 2^{999999000666666} is an apocalyptic number.

999999000666666 is an abundant number, since it is smaller than the sum of its proper divisors (1987713003316950).

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

999999000666666 is a wasteful number, since it uses less digits than its factorization.

999999000666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500000077 (or 1500000074 counting only the distinct ones).

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

The spelling of 999999000666666 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred sixty-six thousand, six hundred sixty-six".