6645580 has 24 divisors (see below), whose sum is σ = 14026320. Its totient is φ = 2644800.

The previous prime is 6645577. The next prime is 6645593. The reversal of 6645580 is 855466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3855 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (584430).

Almost surely, 2^6645580 is an apocalyptic number.

It is an amenable number.

6645580 is an abundant number, since it is smaller than the sum of its proper divisors (7380740).

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

6645580 is a wasteful number, since it uses less digits than its factorization.

6645580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 6645580 is about 2577.9022479528. The cubic root of 6645580 is about 188.0085630625.

It can be divided in two parts, 6645 and 580, that added together give a square (7225 = 85²).

The spelling of 6645580 in words is "six million, six hundred forty-five thousand, five hundred eighty".