66885700501079 has 2 divisors, whose sum is σ = 66885700501080. Its totient is φ = 66885700501078.

The previous prime is 66885700501073. The next prime is 66885700501141. The reversal of 66885700501079 is 97010500758866.

It is an a-pointer prime, because the next prime (66885700501141) can be obtained adding 66885700501079 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66885700501079 - 2⁸ = 66885700500823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66885700501073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33442850250539 + 33442850250540.

It is an arithmetic number, because the mean of its divisors is an integer number (33442850250540).

Almost surely, 2^{66885700501079} is an apocalyptic number.

66885700501079 is a deficient number, since it is larger than the sum of its proper divisors (1).

66885700501079 is an equidigital number, since it uses as much as digits as its factorization.

66885700501079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 66885700501079 in words is "sixty-six trillion, eight hundred eighty-five billion, seven hundred million, five hundred one thousand, seventy-nine".