6645760 has 96 divisors (see below), whose sum is σ = 17690400. Its totient is φ = 2375680.

The previous prime is 6645757. The next prime is 6645787. The reversal of 6645760 is 675466.

It is a super-2 number, since 2×6645760² = 88332251955200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112611 + ... + 112669.

It is an arithmetic number, because the mean of its divisors is an integer number (184275).

Almost surely, 2^6645760 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 6645760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8845200).

6645760 is an abundant number, since it is smaller than the sum of its proper divisors (11044640).

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

6645760 is a wasteful number, since it uses less digits than its factorization.

6645760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 6645760 is about 2577.9371598237. The cubic root of 6645760 is about 188.0102604933.

The spelling of 6645760 in words is "six million, six hundred forty-five thousand, seven hundred sixty".