998999799906 has 8 divisors (see below), whose sum is σ = 1997999599824. Its totient is φ = 332999933300.

The previous prime is 998999799881. The next prime is 998999799913. The reversal of 998999799906 is 609997999899.

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

998999799906 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 998999799906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83249983320 + ... + 83249983331.

It is an arithmetic number, because the mean of its divisors is an integer number (249749949978).

Almost surely, 2^998999799906 is an apocalyptic number.

998999799906 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.

998999799906 is a wasteful number, since it uses less digits than its factorization.

998999799906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166499966656.

The product of its (nonzero) digits is 14463698256, while the sum is 93.

The spelling of 998999799906 in words is "nine hundred ninety-eight billion, nine hundred ninety-nine million, seven hundred ninety-nine thousand, nine hundred six".