6600660 has 96 divisors (see below), whose sum is σ = 20587392. Its totient is φ = 1566720.

The previous prime is 6600623. The next prime is 6600667. The reversal of 6600660 is 660066.

It is a self number, because there is not a number n which added to its sum of digits gives 6600660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6600667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48112 + ... + 48248.

It is an arithmetic number, because the mean of its divisors is an integer number (214452).

Almost surely, 2^6600660 is an apocalyptic number.

6600660 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 6600660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10293696).

6600660 is an abundant number, since it is smaller than the sum of its proper divisors (13986732).

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

6600660 is a wasteful number, since it uses less digits than its factorization.

6600660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 6600660 is about 2569.1749648477. The cubic root of 6600660 is about 187.5839979198.

It can be divided in two parts, 66006 and 60, that added together give a palindrome (66066).

The spelling of 6600660 in words is "six million, six hundred thousand, six hundred sixty".