6642615407775 has 24 divisors (see below), whose sum is σ = 10982581731984. Its totient is φ = 3542688134400.

The previous prime is 6642615407737. The next prime is 6642615407797. The reversal of 6642615407775 is 5777045162466.

It is not a de Polignac number, because 6642615407775 - 2⁷ = 6642615407647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6895017 + ... + 7799133.

It is an arithmetic number, because the mean of its divisors is an integer number (457607572166).

Almost surely, 2^{6642615407775} is an apocalyptic number.

6642615407775 is a deficient number, since it is larger than the sum of its proper divisors (4339966324209).

6642615407775 is a wasteful number, since it uses less digits than its factorization.

6642615407775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002091 (or 1002086 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 60.

The spelling of 6642615407775 in words is "six trillion, six hundred forty-two billion, six hundred fifteen million, four hundred seven thousand, seven hundred seventy-five".