999999999906 has 8 divisors (see below), whose sum is σ = 1999999999824. Its totient is φ = 333333333300.

The previous prime is 999999999899. The next prime is 999999999937. The reversal of 999999999906 is 609999999999.

It is a sphenic number, since it is the product of 3 distinct primes.

999999999906 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83333333320 + ... + 83333333331.

It is an arithmetic number, because the mean of its divisors is an integer number (249999999978).

Almost surely, 2^999999999906 is an apocalyptic number.

999999999906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

999999999906 is a wasteful number, since it uses less digits than its factorization.

999999999906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166666666656.

The product of its (nonzero) digits is 20920706406, while the sum is 96.

The spelling of 999999999906 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred six".