6643361156 has 12 divisors (see below), whose sum is σ = 11738755392. Its totient is φ = 3289431048.

The previous prime is 6643361143. The next prime is 6643361177. The reversal of 6643361156 is 6511633466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8061920 + ... + 8062743.

It is an arithmetic number, because the mean of its divisors is an integer number (978229616).

Almost surely, 2^6643361156 is an apocalyptic number.

It is an amenable number.

6643361156 is a deficient number, since it is larger than the sum of its proper divisors (5095394236).

6643361156 is a wasteful number, since it uses less digits than its factorization.

6643361156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16124770 (or 16124768 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 6643361156 is about 81506.8166229058. The cubic root of 6643361156 is about 1879.8763646626.

The spelling of 6643361156 in words is "six billion, six hundred forty-three million, three hundred sixty-one thousand, one hundred fifty-six".