6642514641 has 32 divisors (see below), whose sum is σ = 10483741440. Its totient is φ = 3660362496.

The previous prime is 6642514639. The next prime is 6642514649. The reversal of 6642514641 is 1464152466.

It is not a de Polignac number, because 6642514641 - 2¹ = 6642514639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6642514641.

It is not an unprimeable number, because it can be changed into a prime (6642514649) 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 31 ways as a sum of consecutive naturals, for example, 527875 + ... + 540311.

It is an arithmetic number, because the mean of its divisors is an integer number (327616920).

Almost surely, 2^6642514641 is an apocalyptic number.

It is an amenable number.

6642514641 is a deficient number, since it is larger than the sum of its proper divisors (3841226799).

6642514641 is a wasteful number, since it uses less digits than its factorization.

6642514641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13353.

The product of its digits is 138240, while the sum is 39.

The square root of 6642514641 is about 81501.6235482460. The cubic root of 6642514641 is about 1879.7965149651.

The spelling of 6642514641 in words is "six billion, six hundred forty-two million, five hundred fourteen thousand, six hundred forty-one".