8660398633920 has 1344 divisors, whose sum is σ = 36947348812800. Its totient is φ = 1889940602880.

The previous prime is 8660398633919. The next prime is 8660398633927. The reversal of 8660398633920 is 293368930668.

8660398633920 is a `hidden beast` number, since 86 + 60 + 39 + 86 + 3 + 392 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8660398633927) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 631724026 + ... + 631737734.

Almost surely, 2^{8660398633920} is an apocalyptic number.

8660398633920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8660398633920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18473674406400).

8660398633920 is an abundant number, since it is smaller than the sum of its proper divisors (28286950178880).

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

8660398633920 is a wasteful number, since it uses less digits than its factorization.

8660398633920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13803 (or 13770 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 63.

The spelling of 8660398633920 in words is "eight trillion, six hundred sixty billion, three hundred ninety-eight million, six hundred thirty-three thousand, nine hundred twenty".