67686731117 has 2 divisors, whose sum is σ = 67686731118. Its totient is φ = 67686731116.

The previous prime is 67686731093. The next prime is 67686731197. The reversal of 67686731117 is 71113768676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61447468996 + 6239262121 = 247886^2 + 78989^2 .

It is a cyclic number.

It is not a de Polignac number, because 67686731117 - 2¹⁰ = 67686730093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67686731197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33843365558 + 33843365559.

It is an arithmetic number, because the mean of its divisors is an integer number (33843365559).

Almost surely, 2^67686731117 is an apocalyptic number.

It is an amenable number.

67686731117 is a deficient number, since it is larger than the sum of its proper divisors (1).

67686731117 is an equidigital number, since it uses as much as digits as its factorization.

67686731117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The spelling of 67686731117 in words is "sixty-seven billion, six hundred eighty-six million, seven hundred thirty-one thousand, one hundred seventeen".