8665020 has 216 divisors, whose sum is σ = 33817056. Its totient is φ = 1748736.

The previous prime is 8664991. The next prime is 8665021. The reversal of 8665020 is 205668.

8665020 is a `hidden beast` number, since 8 + 6 + 650 + 2 + 0 = 666.

8665020 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 not an unprimeable number, because it can be changed into a prime (8665021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 376729 + ... + 376751.

Almost surely, 2^8665020 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 8665020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16908528).

8665020 is an abundant number, since it is smaller than the sum of its proper divisors (25152036).

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

8665020 is a wasteful number, since it uses less digits than its factorization.

8665020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 8665020 is about 2943.6406030628. The cubic root of 8665020 is about 205.3949949273.

It can be divided in two parts, 866 and 5020, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 8665020 in words is "eight million, six hundred sixty-five thousand, twenty".