9887986266 has 16 divisors (see below), whose sum is σ = 19778320800. Its totient is φ = 3295604048.

The previous prime is 9887986259. The next prime is 9887986279. The reversal of 9887986266 is 6626897889.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 9887986266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40521 + ... + 146348.

It is an arithmetic number, because the mean of its divisors is an integer number (1236145050).

Almost surely, 2^9887986266 is an apocalyptic number.

9887986266 is an abundant number, since it is smaller than the sum of its proper divisors (9890334534).

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

9887986266 is a wasteful number, since it uses less digits than its factorization.

9887986266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195693.

The product of its digits is 125411328, while the sum is 69.

The square root of 9887986266 is about 99438.3540994118. The cubic root of 9887986266 is about 2146.3602571750.

The spelling of 9887986266 in words is "nine billion, eight hundred eighty-seven million, nine hundred eighty-six thousand, two hundred sixty-six".