999998888866667 has 8 divisors (see below), whose sum is σ = 1000499067471840. Its totient is φ = 999498790664640.

The previous prime is 999998888866651. The next prime is 999998888866741. The reversal of 999998888866667 is 766668888899999.

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

It is a cyclic number.

It is not a de Polignac number, because 999998888866667 - 2⁴ = 999998888866651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999998888866567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4787759 + ... + 44976887.

It is an arithmetic number, because the mean of its divisors is an integer number (125062383433980).

Almost surely, 2^{999998888866667} is an apocalyptic number.

999998888866667 is a deficient number, since it is larger than the sum of its proper divisors (500178605173).

999998888866667 is a wasteful number, since it uses less digits than its factorization.

999998888866667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40201573.

The product of its digits is 17553572757504, while the sum is 116.

The spelling of 999998888866667 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred sixty-six thousand, six hundred sixty-seven".