66335041216513 has 8 divisors (see below), whose sum is σ = 66404709269000. Its totient is φ = 66265380937728.

The previous prime is 66335041216441. The next prime is 66335041216517. The reversal of 66335041216513 is 31561214053366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 321089955904 + 66013951260609 = 566648^2 + 8124897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66335041216513 - 2¹⁷ = 66335041085441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66335041216517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15211513 + ... + 19080361.

It is an arithmetic number, because the mean of its divisors is an integer number (8300588658625).

Almost surely, 2^{66335041216513} is an apocalyptic number.

It is an amenable number.

66335041216513 is a deficient number, since it is larger than the sum of its proper divisors (69668052487).

66335041216513 is a wasteful number, since it uses less digits than its factorization.

66335041216513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886851.

The product of its (nonzero) digits is 1166400, while the sum is 46.

Adding to 66335041216513 its reverse (31561214053366), we get a palindrome (97896255269879).

The spelling of 66335041216513 in words is "sixty-six trillion, three hundred thirty-five billion, forty-one million, two hundred sixteen thousand, five hundred thirteen".