6643401308 has 24 divisors (see below), whose sum is σ = 12256333824. Its totient is φ = 3146151600.

The previous prime is 6643401301. The next prime is 6643401311. The reversal of 6643401308 is 8031043466.

It is a super-2 number, since 2×6643401308² = 88269561878272221728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643401301) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 564128 + ... + 575783.

It is an arithmetic number, because the mean of its divisors is an integer number (510680576).

Almost surely, 2^6643401308 is an apocalyptic number.

It is an amenable number.

6643401308 is a deficient number, since it is larger than the sum of its proper divisors (5612932516).

6643401308 is a wasteful number, since it uses less digits than its factorization.

6643401308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139993 (or 1139991 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 6643401308 is about 81507.0629332207. The cubic root of 6643401308 is about 1879.8801519344.

The spelling of 6643401308 in words is "six billion, six hundred forty-three million, four hundred one thousand, three hundred eight".