999999986666676 has 48 divisors (see below), whose sum is σ = 2400161895212928. Its totient is φ = 323853856588800.

The previous prime is 999999986666623. The next prime is 999999986666677. The reversal of 999999986666676 is 676666689999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999986666677) 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 15 ways as a sum of consecutive naturals, for example, 4216728520 + ... + 4216965663.

It is an arithmetic number, because the mean of its divisors is an integer number (50003372816936).

Almost surely, 2^{999999986666676} is an apocalyptic number.

It is an amenable number.

999999986666676 is an abundant number, since it is smaller than the sum of its proper divisors (1400161908546252).

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

999999986666676 is a wasteful number, since it uses less digits than its factorization.

999999986666676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8433694472 (or 8433694470 counting only the distinct ones).

The product of its digits is 12496635293184, while the sum is 114.

The spelling of 999999986666676 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-six million, six hundred sixty-six thousand, six hundred seventy-six".