67756673729 has 2 divisors, whose sum is σ = 67756673730. Its totient is φ = 67756673728.

The previous prime is 67756673689. The next prime is 67756673819. The reversal of 67756673729 is 92737665776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62424023104 + 5332650625 = 249848^2 + 73025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67756673729 is a prime.

It is a super-3 number, since 3×67756673729³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (67756672729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33878336864 + 33878336865.

It is an arithmetic number, because the mean of its divisors is an integer number (33878336865).

Almost surely, 2^67756673729 is an apocalyptic number.

It is an amenable number.

67756673729 is a deficient number, since it is larger than the sum of its proper divisors (1).

67756673729 is an equidigital number, since it uses as much as digits as its factorization.

67756673729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140026320, while the sum is 65.

The spelling of 67756673729 in words is "sixty-seven billion, seven hundred fifty-six million, six hundred seventy-three thousand, seven hundred twenty-nine".