66748635139 has 2 divisors, whose sum is σ = 66748635140. Its totient is φ = 66748635138.

The previous prime is 66748635101. The next prime is 66748635193. The reversal of 66748635139 is 93153684766.

It is a happy number.

Together with next prime (66748635193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66748635139 is a prime.

It is not a weakly prime, because it can be changed into another prime (66748635439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33374317569 + 33374317570.

It is an arithmetic number, because the mean of its divisors is an integer number (33374317570).

Almost surely, 2^66748635139 is an apocalyptic number.

66748635139 is a deficient number, since it is larger than the sum of its proper divisors (1).

66748635139 is an equidigital number, since it uses as much as digits as its factorization.

66748635139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 58.

The spelling of 66748635139 in words is "sixty-six billion, seven hundred forty-eight million, six hundred thirty-five thousand, one hundred thirty-nine".