8646660 has 108 divisors (see below), whose sum is σ = 28901964. Its totient is φ = 2090880.

The previous prime is 8646607. The next prime is 8646667. The reversal of 8646660 is 666468.

8646660 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 4186116 = 2112^2 + 2046^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (8646667) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21582 + ... + 21978.

Almost surely, 2^8646660 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 8646660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14450982).

8646660 is an abundant number, since it is smaller than the sum of its proper divisors (20255304).

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

8646660 is a wasteful number, since it uses less digits than its factorization.

8646660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 8646660 is about 2940.5203621128. The cubic root of 8646660 is about 205.2498243182.

The spelling of 8646660 in words is "eight million, six hundred forty-six thousand, six hundred sixty".