8661880 has 32 divisors (see below), whose sum is σ = 19731600. Its totient is φ = 3421696.

The previous prime is 8661871. The next prime is 8661881. The reversal of 8661880 is 881668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661881) 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, 2016 + ... + 4624.

Almost surely, 2^8661880 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 8661880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9865800).

8661880 is an abundant number, since it is smaller than the sum of its proper divisors (11069720).

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

8661880 is a wasteful number, since it uses less digits than its factorization.

8661880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2699 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 8661880 is about 2943.1072015813. The cubic root of 8661880 is about 205.3701818204.

The spelling of 8661880 in words is "eight million, six hundred sixty-one thousand, eight hundred eighty".