6642705771751 has 16 divisors (see below), whose sum is σ = 7603949219328. Its totient is φ = 5684540824800.

The previous prime is 6642705771727. The next prime is 6642705771857. The reversal of 6642705771751 is 1571775072466.

It is a cyclic number.

It is not a de Polignac number, because 6642705771751 - 2⁹ = 6642705771239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642705771551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10932126 + ... + 11523748.

It is an arithmetic number, because the mean of its divisors is an integer number (475246826208).

Almost surely, 2^{6642705771751} is an apocalyptic number.

6642705771751 is a deficient number, since it is larger than the sum of its proper divisors (961243447577).

6642705771751 is a wasteful number, since it uses less digits than its factorization.

6642705771751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594222.

The product of its (nonzero) digits is 17287200, while the sum is 58.

The spelling of 6642705771751 in words is "six trillion, six hundred forty-two billion, seven hundred five million, seven hundred seventy-one thousand, seven hundred fifty-one".