6625040 has 20 divisors (see below), whose sum is σ = 15403404. Its totient is φ = 2649984.

The previous prime is 6625039. The next prime is 6625043. The reversal of 6625040 is 405266.

It can be written as a sum of positive squares in 2 ways, for example, as 3625216 + 2999824 = 1904^2 + 1732^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6624997 and 6625015.

It is not an unprimeable number, because it can be changed into a prime (6625043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41327 + ... + 41486.

Almost surely, 2^6625040 is an apocalyptic number.

It is an amenable number.

6625040 is an abundant number, since it is smaller than the sum of its proper divisors (8778364).

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

6625040 is a wasteful number, since it uses less digits than its factorization.

6625040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82826 (or 82820 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 6625040 is about 2573.9153055219. The cubic root of 6625040 is about 187.8146657013.

The spelling of 6625040 in words is "six million, six hundred twenty-five thousand, forty".