8665540 has 24 divisors (see below), whose sum is σ = 19598040. Its totient is φ = 3199488.

The previous prime is 8665499. The next prime is 8665541. The reversal of 8665540 is 455668.

It can be written as a sum of positive squares in 4 ways, for example, as 451584 + 8213956 = 672^2 + 2866^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 8665496 and 8665505.

It is not an unprimeable number, because it can be changed into a prime (8665541) 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, 16405 + ... + 16924.

It is an arithmetic number, because the mean of its divisors is an integer number (816585).

Almost surely, 2^8665540 is an apocalyptic number.

It is an amenable number.

8665540 is an abundant number, since it is smaller than the sum of its proper divisors (10932500).

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

8665540 is a wasteful number, since it uses less digits than its factorization.

8665540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33351 (or 33349 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 8665540 is about 2943.7289277377. The cubic root of 8665540 is about 205.3991035257.

The spelling of 8665540 in words is "eight million, six hundred sixty-five thousand, five hundred forty".