8666940 has 96 divisors (see below), whose sum is σ = 26671680. Its totient is φ = 2093056.

The previous prime is 8666939. The next prime is 8666953. The reversal of 8666940 is 496668.

8666940 = 706² + 707² + ... + 722².

8666940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29434 + ... + 29726.

It is an arithmetic number, because the mean of its divisors is an integer number (277830).

Almost surely, 2^8666940 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 8666940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13335840).

8666940 is an abundant number, since it is smaller than the sum of its proper divisors (18004740).

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

8666940 is a wasteful number, since it uses less digits than its factorization.

8666940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 8666940 is about 2943.9667117683. The cubic root of 8666940 is about 205.4101643198.

The spelling of 8666940 in words is "eight million, six hundred sixty-six thousand, nine hundred forty".