6643760 has 20 divisors (see below), whose sum is σ = 15446928. Its totient is φ = 2657472.

The previous prime is 6643739. The next prime is 6643781. The reversal of 6643760 is 673466.

It is an interprime number because it is at equal distance from previous prime (6643739) and next prime (6643781).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41444 + ... + 41603.

Almost surely, 2^6643760 is an apocalyptic number.

It is an amenable number.

6643760 is an abundant number, since it is smaller than the sum of its proper divisors (8803168).

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

6643760 is a wasteful number, since it uses less digits than its factorization.

6643760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83060 (or 83054 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 6643760 is about 2577.5492235843. The cubic root of 6643760 is about 187.9913984295.

The spelling of 6643760 in words is "six million, six hundred forty-three thousand, seven hundred sixty".