65666550115679 has 2 divisors, whose sum is σ = 65666550115680. Its totient is φ = 65666550115678.

The previous prime is 65666550115409. The next prime is 65666550115693. The reversal of 65666550115679 is 97651105566656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65666550115679 - 2³⁶ = 65597830638943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65666556115679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833275057839 + 32833275057840.

It is an arithmetic number, because the mean of its divisors is an integer number (32833275057840).

Almost surely, 2^{65666550115679} is an apocalyptic number.

65666550115679 is a deficient number, since it is larger than the sum of its proper divisors (1).

65666550115679 is an equidigital number, since it uses as much as digits as its factorization.

65666550115679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180000, while the sum is 68.

The spelling of 65666550115679 in words is "sixty-five trillion, six hundred sixty-six billion, five hundred fifty million, one hundred fifteen thousand, six hundred seventy-nine".