6659240 has 64 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 2147328.

The previous prime is 6659239. The next prime is 6659243. The reversal of 6659240 is 429566.

It is a junction number, because it is equal to n+sod(n) for n = 6659197 and 6659206.

It is not an unprimeable number, because it can be changed into a prime (6659243) 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 15 ways as a sum of consecutive naturals, for example, 4061 + ... + 5459.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

Almost surely, 2^6659240 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 6659240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9072000).

6659240 is an abundant number, since it is smaller than the sum of its proper divisors (11484760).

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

6659240 is a wasteful number, since it uses less digits than its factorization.

6659240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6659240 is about 2580.5503289027. The cubic root of 6659240 is about 188.1372921995.

The spelling of 6659240 in words is "six million, six hundred fifty-nine thousand, two hundred forty".