67140721042429 has 2 divisors, whose sum is σ = 67140721042430. Its totient is φ = 67140721042428.

The previous prime is 67140721042397. The next prime is 67140721042441. The reversal of 67140721042429 is 92424012704176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66966562556100 + 174158486329 = 8183310^2 + 417323^2 .

It is a cyclic number.

It is not a de Polignac number, because 67140721042429 - 2⁵ = 67140721042397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67140721042729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33570360521214 + 33570360521215.

It is an arithmetic number, because the mean of its divisors is an integer number (33570360521215).

Almost surely, 2^{67140721042429} is an apocalyptic number.

It is an amenable number.

67140721042429 is a deficient number, since it is larger than the sum of its proper divisors (1).

67140721042429 is an equidigital number, since it uses as much as digits as its factorization.

67140721042429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 67140721042429 in words is "sixty-seven trillion, one hundred forty billion, seven hundred twenty-one million, forty-two thousand, four hundred twenty-nine".