66213142301533 has 2 divisors, whose sum is σ = 66213142301534. Its totient is φ = 66213142301532.

The previous prime is 66213142301507. The next prime is 66213142301567. The reversal of 66213142301533 is 33510324131266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65267041755204 + 946100546329 = 8078802^2 + 972677^2 .

It is a cyclic number.

It is not a de Polignac number, because 66213142301533 - 2²⁵ = 66213108747101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66213142601533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106571150766 + 33106571150767.

It is an arithmetic number, because the mean of its divisors is an integer number (33106571150767).

Almost surely, 2^{66213142301533} is an apocalyptic number.

It is an amenable number.

66213142301533 is a deficient number, since it is larger than the sum of its proper divisors (1).

66213142301533 is an equidigital number, since it uses as much as digits as its factorization.

66213142301533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 66213142301533 its reverse (33510324131266), we get a palindrome (99723466432799).

The spelling of 66213142301533 in words is "sixty-six trillion, two hundred thirteen billion, one hundred forty-two million, three hundred one thousand, five hundred thirty-three".