67507991297 has 2 divisors, whose sum is σ = 67507991298. Its totient is φ = 67507991296.

The previous prime is 67507991267. The next prime is 67507991303. The reversal of 67507991297 is 79219970576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51621657616 + 15886333681 = 227204^2 + 126041^2 .

It is a cyclic number.

It is not a de Polignac number, because 67507991297 - 2³⁴ = 50328122113 is a prime.

It is not a weakly prime, because it can be changed into another prime (67507991227) 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, 33753995648 + 33753995649.

It is an arithmetic number, because the mean of its divisors is an integer number (33753995649).

Almost surely, 2^67507991297 is an apocalyptic number.

It is an amenable number.

67507991297 is a deficient number, since it is larger than the sum of its proper divisors (1).

67507991297 is an equidigital number, since it uses as much as digits as its factorization.

67507991297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15002820, while the sum is 62.

The spelling of 67507991297 in words is "sixty-seven billion, five hundred seven million, nine hundred ninety-one thousand, two hundred ninety-seven".