6643012 has 12 divisors (see below), whose sum is σ = 11644416. Its totient is φ = 3316040.

The previous prime is 6642997. The next prime is 6643019. The reversal of 6643012 is 2103466.

It is a super-3 number, since 3×6643012³ (a number of 21 digits) contains 333 as substring.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (6643019) 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 3 ways as a sum of consecutive naturals, for example, 2733 + ... + 4555.

It is an arithmetic number, because the mean of its divisors is an integer number (970368).

Almost surely, 2^6643012 is an apocalyptic number.

It is an amenable number.

6643012 is a deficient number, since it is larger than the sum of its proper divisors (5001404).

6643012 is a wasteful number, since it uses less digits than its factorization.

6643012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738 (or 2736 counting only the distinct ones).

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

The square root of 6643012 is about 2577.4041204281. The cubic root of 6643012 is about 187.9843430450.

Adding to 6643012 its reverse (2103466), we get a palindrome (8746478).

The spelling of 6643012 in words is "six million, six hundred forty-three thousand, twelve".