9880866 has 40 divisors (see below), whose sum is σ = 22320144. Its totient is φ = 3280500.

The previous prime is 9880861. The next prime is 9880873. The reversal of 9880866 is 6680889.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9880861) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39241 + ... + 39491.

Almost surely, 2^9880866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9880866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11160072).

9880866 is an abundant number, since it is smaller than the sum of its proper divisors (12439278).

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

9880866 is an frugal number, since it uses more digits than its factorization.

9880866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 9880866 is about 3143.3844817330. The cubic root of 9880866 is about 214.5844940732.

The spelling of 9880866 in words is "nine million, eight hundred eighty thousand, eight hundred sixty-six".