67686739313 has 2 divisors, whose sum is σ = 67686739314. Its totient is φ = 67686739312.

The previous prime is 67686739279. The next prime is 67686739391. The reversal of 67686739313 is 31393768676.

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., 44830439824 + 22856299489 = 211732^2 + 151183^2 .

It is a cyclic number.

It is not a de Polignac number, because 67686739313 - 2¹⁶ = 67686673777 is a prime.

It is not a weakly prime, because it can be changed into another prime (67686739613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33843369656 + 33843369657.

It is an arithmetic number, because the mean of its divisors is an integer number (33843369657).

Almost surely, 2^67686739313 is an apocalyptic number.

It is an amenable number.

67686739313 is a deficient number, since it is larger than the sum of its proper divisors (1).

67686739313 is an equidigital number, since it uses as much as digits as its factorization.

67686739313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 59.

The spelling of 67686739313 in words is "sixty-seven billion, six hundred eighty-six million, seven hundred thirty-nine thousand, three hundred thirteen".