6646000 has 40 divisors (see below), whose sum is σ = 16074864. Its totient is φ = 2657600.

The previous prime is 6645983. The next prime is 6646001. The reversal of 6646000 is 6466.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646001) 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 7 ways as a sum of consecutive naturals, for example, 339 + ... + 3661.

Almost surely, 2^6646000 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 6646000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8037432).

6646000 is an abundant number, since it is smaller than the sum of its proper divisors (9428864).

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

6646000 is a wasteful number, since it uses less digits than its factorization.

6646000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 6646000 is about 2577.9837082495. The cubic root of 6646000 is about 188.0125236866.

The spelling of 6646000 in words is "six million, six hundred forty-six thousand".