66161269753589 has 2 divisors, whose sum is σ = 66161269753590. Its totient is φ = 66161269753588.

The previous prime is 66161269753583. The next prime is 66161269753661. The reversal of 66161269753589 is 98535796216166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66132400345489 + 28869408100 = 8132183^2 + 169910^2 .

It is a cyclic number.

It is not a de Polignac number, because 66161269753589 - 2¹⁶ = 66161269688053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66161269753583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33080634876794 + 33080634876795.

It is an arithmetic number, because the mean of its divisors is an integer number (33080634876795).

Almost surely, 2^{66161269753589} is an apocalyptic number.

It is an amenable number.

66161269753589 is a deficient number, since it is larger than the sum of its proper divisors (1).

66161269753589 is an equidigital number, since it uses as much as digits as its factorization.

66161269753589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 881798400, while the sum is 74.

The spelling of 66161269753589 in words is "sixty-six trillion, one hundred sixty-one billion, two hundred sixty-nine million, seven hundred fifty-three thousand, five hundred eighty-nine".