6645080 has 48 divisors (see below), whose sum is σ = 16206480. Its totient is φ = 2451072.

The previous prime is 6645077. The next prime is 6645083. The reversal of 6645080 is 805466.

It is an interprime number because it is at equal distance from previous prime (6645077) and next prime (6645083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645083) 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 11 ways as a sum of consecutive naturals, for example, 6269 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (337635).

Almost surely, 2^6645080 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 6645080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8103240).

6645080 is an abundant number, since it is smaller than the sum of its proper divisors (9561400).

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

6645080 is a wasteful number, since it uses less digits than its factorization.

6645080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 6645080 is about 2577.8052680527. The cubic root of 6645080 is about 188.0038478162.

The spelling of 6645080 in words is "six million, six hundred forty-five thousand, eighty".