8681665744 has 120 divisors (see below), whose sum is σ = 18812813760. Its totient is φ = 3863033856.

The previous prime is 8681665709. The next prime is 8681665777. The reversal of 8681665744 is 4475661868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37260252 + ... + 37260484.

It is an arithmetic number, because the mean of its divisors is an integer number (156773448).

Almost surely, 2^8681665744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8681665744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9406406880).

8681665744 is an abundant number, since it is smaller than the sum of its proper divisors (10131148016).

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

8681665744 is a wasteful number, since it uses less digits than its factorization.

8681665744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 350 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 55.

The square root of 8681665744 is about 93175.4567684001. The cubic root of 8681665744 is about 2055.2643395986.

The spelling of 8681665744 in words is "eight billion, six hundred eighty-one million, six hundred sixty-five thousand, seven hundred forty-four".