67120786591 has 2 divisors, whose sum is σ = 67120786592. Its totient is φ = 67120786590.

The previous prime is 67120786589. The next prime is 67120786651. The reversal of 67120786591 is 19568702176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67120786591 - 2¹ = 67120786589 is a prime.

Together with 67120786589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67120786531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33560393295 + 33560393296.

It is an arithmetic number, because the mean of its divisors is an integer number (33560393296).

Almost surely, 2^67120786591 is an apocalyptic number.

67120786591 is a deficient number, since it is larger than the sum of its proper divisors (1).

67120786591 is an equidigital number, since it uses as much as digits as its factorization.

67120786591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 67120786591 in words is "sixty-seven billion, one hundred twenty million, seven hundred eighty-six thousand, five hundred ninety-one".