6520860 has 72 divisors (see below), whose sum is σ = 20953296. Its totient is φ = 1635840.

The previous prime is 6520847. The next prime is 6520867. The reversal of 6520860 is 680256.

6520860 is a `hidden beast` number, since 652 + 0 + 8 + 6 + 0 = 666.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1995 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (291018).

Almost surely, 2^6520860 is an apocalyptic number.

6520860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6520860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10476648).

6520860 is an abundant number, since it is smaller than the sum of its proper divisors (14432436).

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

6520860 is a wasteful number, since it uses less digits than its factorization.

6520860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 2158 counting only the distinct ones).

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

The square root of 6520860 is about 2553.5974624048. The cubic root of 6520860 is about 186.8249861498.

The spelling of 6520860 in words is "six million, five hundred twenty thousand, eight hundred sixty".