8889966887 has 4 divisors (see below), whose sum is σ = 8895295080. Its totient is φ = 8884638696.

The previous prime is 8889966863. The next prime is 8889966889. The reversal of 8889966887 is 7886699888.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8889966887 - 2¹⁶ = 8889901351 is a prime.

It is a super-2 number, since 2×8889966887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8889966889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2661593 + ... + 2664930.

It is an arithmetic number, because the mean of its divisors is an integer number (2223823770).

Almost surely, 2^8889966887 is an apocalyptic number.

8889966887 is a deficient number, since it is larger than the sum of its proper divisors (5328193).

8889966887 is a wasteful number, since it uses less digits than its factorization.

8889966887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328192.

The product of its digits is 668860416, while the sum is 77.

The square root of 8889966887 is about 94286.6209331950. The cubic root of 8889966887 is about 2071.5720736869.

The spelling of 8889966887 in words is "eight billion, eight hundred eighty-nine million, nine hundred sixty-six thousand, eight hundred eighty-seven".