66870044688341 has 2 divisors, whose sum is σ = 66870044688342. Its totient is φ = 66870044688340.

The previous prime is 66870044688253. The next prime is 66870044688431. The reversal of 66870044688341 is 14388644007866.

Together with next prime (66870044688431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66779067047716 + 90977640625 = 8171846^2 + 301625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66870044688341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66870044685341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33435022344170 + 33435022344171.

It is an arithmetic number, because the mean of its divisors is an integer number (33435022344171).

Almost surely, 2^{66870044688341} is an apocalyptic number.

It is an amenable number.

66870044688341 is a deficient number, since it is larger than the sum of its proper divisors (1).

66870044688341 is an equidigital number, since it uses as much as digits as its factorization.

66870044688341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148635648, while the sum is 65.

The spelling of 66870044688341 in words is "sixty-six trillion, eight hundred seventy billion, forty-four million, six hundred eighty-eight thousand, three hundred forty-one".