6555660 has 48 divisors (see below), whose sum is σ = 18858336. Its totient is φ = 1700352.

The previous prime is 6555649. The next prime is 6555671. The reversal of 6555660 is 665556.

6555660 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6555649) and next prime (6555671).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (392882).

Almost surely, 2^6555660 is an apocalyptic number.

6555660 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 6555660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9429168).

6555660 is an abundant number, since it is smaller than the sum of its proper divisors (12302676).

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

6555660 is a wasteful number, since it uses less digits than its factorization.

6555660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 6555660 is about 2560.4023121377. The cubic root of 6555660 is about 187.1567408626.

The spelling of 6555660 in words is "six million, five hundred fifty-five thousand, six hundred sixty".