8993661887 has 8 divisors (see below), whose sum is σ = 10529165472. Its totient is φ = 7520832000.

The previous prime is 8993661869. The next prime is 8993661889. The reversal of 8993661887 is 7881663998.

8993661887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8993661887 - 2⁶ = 8993661823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8993661889) 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, 15668114 + ... + 15668687.

It is an arithmetic number, because the mean of its divisors is an integer number (1316145684).

Almost surely, 2^8993661887 is an apocalyptic number.

8993661887 is a deficient number, since it is larger than the sum of its proper divisors (1535503585).

8993661887 is a wasteful number, since it uses less digits than its factorization.

8993661887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31336849.

The product of its digits is 31352832, while the sum is 65.

The square root of 8993661887 is about 94834.9191331969. The cubic root of 8993661887 is about 2079.5954192607.

The spelling of 8993661887 in words is "eight billion, nine hundred ninety-three million, six hundred sixty-one thousand, eight hundred eighty-seven".