6645372 has 24 divisors (see below), whose sum is σ = 15555792. Its totient is φ = 2208000.

The previous prime is 6645341. The next prime is 6645389. The reversal of 6645372 is 2735466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4122 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (648158).

Almost surely, 2^6645372 is an apocalyptic number.

It is an amenable number.

6645372 is an abundant number, since it is smaller than the sum of its proper divisors (8910420).

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

6645372 is a wasteful number, since it uses less digits than its factorization.

6645372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1787 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 6645372 is about 2577.8619047575. The cubic root of 6645372 is about 188.0066015488.

The spelling of 6645372 in words is "six million, six hundred forty-five thousand, three hundred seventy-two".