6605321568 has 24 divisors (see below), whose sum is σ = 17338969368. Its totient is φ = 2201773824.

The previous prime is 6605321543. The next prime is 6605321581. The reversal of 6605321568 is 8651235066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34402621 + ... + 34402812.

It is an arithmetic number, because the mean of its divisors is an integer number (722457057).

Almost surely, 2^6605321568 is an apocalyptic number.

It is an amenable number.

6605321568 is an abundant number, since it is smaller than the sum of its proper divisors (10733647800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6605321568 is a wasteful number, since it uses less digits than its factorization.

6605321568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68805446 (or 68805438 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 6605321568 is about 81273.1294340263. The cubic root of 6605321568 is about 1876.2814652477.

The spelling of 6605321568 in words is "six billion, six hundred five million, three hundred twenty-one thousand, five hundred sixty-eight".