6643613332 has 24 divisors (see below), whose sum is σ = 11789904896. Its totient is φ = 3275391168.

The previous prime is 6643613267. The next prime is 6643613351. The reversal of 6643613332 is 2333163466.

It is a junction number, because it is equal to n+sod(n) for n = 6643613291 and 6643613300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42688 + ... + 122920.

Almost surely, 2^6643613332 is an apocalyptic number.

It is an amenable number.

6643613332 is a deficient number, since it is larger than the sum of its proper divisors (5146291564).

6643613332 is a wasteful number, since it uses less digits than its factorization.

6643613332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80527 (or 80525 counting only the distinct ones).

The product of its digits is 139968, while the sum is 37.

The square root of 6643613332 is about 81508.3635708631. The cubic root of 6643613332 is about 1879.9001504990.

Adding to 6643613332 its reverse (2333163466), we get a palindrome (8976776798).

The spelling of 6643613332 in words is "six billion, six hundred forty-three million, six hundred thirteen thousand, three hundred thirty-two".