6625840 has 80 divisors (see below), whose sum is σ = 17373888. Its totient is φ = 2331648.

The previous prime is 6625823. The next prime is 6625841. The reversal of 6625840 is 485266.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (6625841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23782 + ... + 24058.

Almost surely, 2^6625840 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 6625840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8686944).

6625840 is an abundant number, since it is smaller than the sum of its proper divisors (10748048).

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

6625840 is a wasteful number, since it uses less digits than its factorization.

6625840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 6625840 is about 2574.0707060996. The cubic root of 6625840 is about 187.8222251870.

The spelling of 6625840 in words is "six million, six hundred twenty-five thousand, eight hundred forty".