6888660 has 96 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 1709568.

The previous prime is 6888653. The next prime is 6888667. The reversal of 6888660 is 668886.

6888660 = T₂₈₅ + T₂₈₆ + ... + T₄₀₀.

6888660 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 (6888653) and next prime (6888667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6888667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64327 + ... + 64433.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^6888660 is an apocalyptic number.

6888660 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 6888660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10342080).

6888660 is an abundant number, since it is smaller than the sum of its proper divisors (13795500).

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

6888660 is a wasteful number, since it uses less digits than its factorization.

6888660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 6888660 is about 2624.6256875981. The cubic root of 6888660 is about 190.2734750696.

The spelling of 6888660 in words is "six million, eight hundred eighty-eight thousand, six hundred sixty".