6643132 has 6 divisors (see below), whose sum is σ = 11625488. Its totient is φ = 3321564.

The previous prime is 6643129. The next prime is 6643139. The reversal of 6643132 is 2313466.

It is a junction number, because it is equal to n+sod(n) for n = 6643097 and 6643106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830388 + ... + 830395.

Almost surely, 2^6643132 is an apocalyptic number.

It is an amenable number.

6643132 is a deficient number, since it is larger than the sum of its proper divisors (4982356).

6643132 is a wasteful number, since it uses less digits than its factorization.

6643132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660787 (or 1660785 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 6643132 is about 2577.4273995595. The cubic root of 6643132 is about 187.9854749605.

Adding to 6643132 its reverse (2313466), we get a palindrome (8956598).

The spelling of 6643132 in words is "six million, six hundred forty-three thousand, one hundred thirty-two".