8665009872 has 80 divisors (see below), whose sum is σ = 23063619072. Its totient is φ = 2801226240.

The previous prime is 8665009867. The next prime is 8665009879. The reversal of 8665009872 is 2789005668.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8665009879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555297 + ... + 570687.

Almost surely, 2^8665009872 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 8665009872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11531809536).

8665009872 is an abundant number, since it is smaller than the sum of its proper divisors (14398609200).

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

8665009872 is a wasteful number, since it uses less digits than its factorization.

8665009872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15756 (or 15750 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 8665009872 is about 93086.0347850310. The cubic root of 8665009872 is about 2053.9491490284.

The spelling of 8665009872 in words is "eight billion, six hundred sixty-five million, nine thousand, eight hundred seventy-two".