66717644012359 has 2 divisors, whose sum is σ = 66717644012360. Its totient is φ = 66717644012358.

The previous prime is 66717644012207. The next prime is 66717644012441. The reversal of 66717644012359 is 95321044671766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66717644012359 - 2²¹ = 66717641915207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66717644012297 and 66717644012306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66717644013359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358822006179 + 33358822006180.

It is an arithmetic number, because the mean of its divisors is an integer number (33358822006180).

Almost surely, 2^{66717644012359} is an apocalyptic number.

66717644012359 is a deficient number, since it is larger than the sum of its proper divisors (1).

66717644012359 is an equidigital number, since it uses as much as digits as its factorization.

66717644012359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 66717644012359 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, three hundred fifty-nine".