6681289884481 has 4 divisors (see below), whose sum is σ = 6681716519764. Its totient is φ = 6680863249200.

The previous prime is 6681289884413. The next prime is 6681289884613. The reversal of 6681289884481 is 1844889821866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3329314778881 + 3351975105600 = 1824641^2 + 1830840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6681289884481 - 2³³ = 6672699949889 is a prime.

It is a super-2 number, since 2×6681289884481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681289884281) 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 3 ways as a sum of consecutive naturals, for example, 213294150 + ... + 213325471.

It is an arithmetic number, because the mean of its divisors is an integer number (1670429129941).

Almost surely, 2^{6681289884481} is an apocalyptic number.

It is an amenable number.

6681289884481 is a deficient number, since it is larger than the sum of its proper divisors (426635283).

6681289884481 is a wasteful number, since it uses less digits than its factorization.

6681289884481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426635282.

The product of its digits is 339738624, while the sum is 73.

The spelling of 6681289884481 in words is "six trillion, six hundred eighty-one billion, two hundred eighty-nine million, eight hundred eighty-four thousand, four hundred eighty-one".