66504411121311 has 12 divisors (see below), whose sum is σ = 97219299792888. Its totient is φ = 43802102103504.

The previous prime is 66504411121297. The next prime is 66504411121363. The reversal of 66504411121311 is 11312111440566.

66504411121311 is a `hidden beast` number, since 6 + 6 + 504 + 4 + 1 + 1 + 12 + 131 + 1 = 666.

It is not a de Polignac number, because 66504411121311 - 2²¹ = 66504409024159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66504411126311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44514330660 + ... + 44514332153.

It is an arithmetic number, because the mean of its divisors is an integer number (8101608316074).

Almost surely, 2^{66504411121311} is an apocalyptic number.

66504411121311 is a deficient number, since it is larger than the sum of its proper divisors (30714888671577).

66504411121311 is a wasteful number, since it uses less digits than its factorization.

66504411121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89028662902 (or 89028662899 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 66504411121311 its reverse (11312111440566), we get a palindrome (77816522561877).

The spelling of 66504411121311 in words is "sixty-six trillion, five hundred four billion, four hundred eleven million, one hundred twenty-one thousand, three hundred eleven".