6643607 has 2 divisors, whose sum is σ = 6643608. Its totient is φ = 6643606.

The previous prime is 6643589. The next prime is 6643633. The reversal of 6643607 is 7063466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6643607 - 2¹² = 6639511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6643667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321803 + 3321804.

It is an arithmetic number, because the mean of its divisors is an integer number (3321804).

Almost surely, 2^6643607 is an apocalyptic number.

6643607 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643607 is an equidigital number, since it uses as much as digits as its factorization.

6643607 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6643607 is about 2577.5195440578. The cubic root of 6643607 is about 187.9899553257.

The spelling of 6643607 in words is "six million, six hundred forty-three thousand, six hundred seven".