6643063 has 8 divisors (see below), whose sum is σ = 7626528. Its totient is φ = 5668224.

The previous prime is 6643057. The next prime is 6643069. The reversal of 6643063 is 3603466.

It is an interprime number because it is at equal distance from previous prime (6643057) and next prime (6643069).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6643063 - 2⁹ = 6642551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406 + ... + 3667.

It is an arithmetic number, because the mean of its divisors is an integer number (953316).

Almost surely, 2^6643063 is an apocalyptic number.

6643063 is a deficient number, since it is larger than the sum of its proper divisors (983465).

6643063 is a wasteful number, since it uses less digits than its factorization.

6643063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 6643063 is about 2577.4140140847. The cubic root of 6643063 is about 187.9848241107.

The spelling of 6643063 in words is "six million, six hundred forty-three thousand, sixty-three".