8660520 has 160 divisors (see below), whose sum is σ = 31885920. Its totient is φ = 2099520.

The previous prime is 8660507. The next prime is 8660527. The reversal of 8660520 is 250668.

8660520 is a `hidden beast` number, since 86 + 60 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8660527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 787315 + ... + 787325.

It is an arithmetic number, because the mean of its divisors is an integer number (199287).

Almost surely, 2^8660520 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 8660520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15942960).

8660520 is an abundant number, since it is smaller than the sum of its proper divisors (23225400).

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

8660520 is an equidigital number, since it uses as much as digits as its factorization.

8660520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 21 counting only the distinct ones).

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

The square root of 8660520 is about 2942.8761441828. The cubic root of 8660520 is about 205.3594328811.

It can be divided in two parts, 8660 and 520, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 8660520 in words is "eight million, six hundred sixty thousand, five hundred twenty".