9999998866662 has 96 divisors (see below), whose sum is σ = 24183983450112. Its totient is φ = 2697537600000.

The previous prime is 9999998866573. The next prime is 9999998866687. The reversal of 9999998866662 is 2666688999999.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9999998866662.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 95839 + ... + 4473162.

It is an arithmetic number, because the mean of its divisors is an integer number (251916494272).

Almost surely, 2^{9999998866662} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999998866662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12091991725056).

9999998866662 is an abundant number, since it is smaller than the sum of its proper divisors (14183984583450).

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

9999998866662 is a wasteful number, since it uses less digits than its factorization.

9999998866662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569126 (or 4569085 counting only the distinct ones).

The product of its digits is 88159684608, while the sum is 96.

The spelling of 9999998866662 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred sixty-six thousand, six hundred sixty-two".