67126307749 has 2 divisors, whose sum is σ = 67126307750. Its totient is φ = 67126307748.

The previous prime is 67126307747. The next prime is 67126307867. The reversal of 67126307749 is 94770362176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63456129025 + 3670178724 = 251905^2 + 60582^2 .

It is a cyclic number.

It is not a de Polignac number, because 67126307749 - 2¹ = 67126307747 is a prime.

Together with 67126307747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 67126307696 and 67126307705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67126307741) 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, 33563153874 + 33563153875.

It is an arithmetic number, because the mean of its divisors is an integer number (33563153875).

Almost surely, 2^67126307749 is an apocalyptic number.

It is an amenable number.

67126307749 is a deficient number, since it is larger than the sum of its proper divisors (1).

67126307749 is an equidigital number, since it uses as much as digits as its factorization.

67126307749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 52.

The spelling of 67126307749 in words is "sixty-seven billion, one hundred twenty-six million, three hundred seven thousand, seven hundred forty-nine".