66042140701 has 2 divisors, whose sum is σ = 66042140702. Its totient is φ = 66042140700.

The previous prime is 66042140693. The next prime is 66042140711. The reversal of 66042140701 is 10704124066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55648338201 + 10393802500 = 235899^2 + 101950^2 .

It is a cyclic number.

It is not a de Polignac number, because 66042140701 - 2³ = 66042140693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66042140711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33021070350 + 33021070351.

It is an arithmetic number, because the mean of its divisors is an integer number (33021070351).

Almost surely, 2^66042140701 is an apocalyptic number.

It is an amenable number.

66042140701 is a deficient number, since it is larger than the sum of its proper divisors (1).

66042140701 is an equidigital number, since it uses as much as digits as its factorization.

66042140701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 66042140701 its reverse (10704124066), we get a palindrome (76746264767).

The spelling of 66042140701 in words is "sixty-six billion, forty-two million, one hundred forty thousand, seven hundred one".