6642007911 has 64 divisors (see below), whose sum is σ = 12286909440. Its totient is φ = 3445096320.

The previous prime is 6642007907. The next prime is 6642007921. The reversal of 6642007911 is 1197002466.

6642007911 is a `hidden beast` number, since 6 + 642 + 0 + 0 + 7 + 9 + 1 + 1 = 666.

It is not a de Polignac number, because 6642007911 - 2² = 6642007907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642007921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1605001 + ... + 1609133.

It is an arithmetic number, because the mean of its divisors is an integer number (191982960).

Almost surely, 2^6642007911 is an apocalyptic number.

6642007911 is a deficient number, since it is larger than the sum of its proper divisors (5644901529).

6642007911 is a wasteful number, since it uses less digits than its factorization.

6642007911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933 (or 4927 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6642007911 is about 81498.5147778780. The cubic root of 6642007911 is about 1879.7487131128.

Subtracting from 6642007911 its reverse (1197002466), we obtain a palindrome (5445005445).

The spelling of 6642007911 in words is "six billion, six hundred forty-two million, seven thousand, nine hundred eleven".