8993663998 has 16 divisors (see below), whose sum is σ = 14743346544. Its totient is φ = 4080684160.

The previous prime is 8993663993. The next prime is 8993663999.

8993663998 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8993663993) 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, 354715 + ... + 379222.

It is an arithmetic number, because the mean of its divisors is an integer number (921459159).

Almost surely, 2^8993663998 is an apocalyptic number.

8993663998 is a deficient number, since it is larger than the sum of its proper divisors (5749682546).

8993663998 is a wasteful number, since it uses less digits than its factorization.

8993663998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734507.

The product of its digits is 136048896, while the sum is 70.

The square root of 8993663998 is about 94834.9302630629. The cubic root of 8993663998 is about 2079.5955819688.

The spelling of 8993663998 in words is "eight billion, nine hundred ninety-three million, six hundred sixty-three thousand, nine hundred ninety-eight".