6609840 has 40 divisors (see below), whose sum is σ = 20491248. Its totient is φ = 1762560.

The previous prime is 6609833. The next prime is 6609847. The reversal of 6609840 is 489066.

6609840 is digitally balanced in base 4, 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 (6609833) and next prime (6609847).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6609847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13531 + ... + 14010.

Almost surely, 2^6609840 is an apocalyptic number.

6609840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6609840 is an abundant number, since it is smaller than the sum of its proper divisors (13881408).

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

6609840 is a wasteful number, since it uses less digits than its factorization.

6609840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27557 (or 27551 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6609840 is about 2570.9609098545. The cubic root of 6609840 is about 187.6709197026.

The spelling of 6609840 in words is "six million, six hundred nine thousand, eight hundred forty".