67653061691 has 2 divisors, whose sum is σ = 67653061692. Its totient is φ = 67653061690.

The previous prime is 67653061687. The next prime is 67653061711. The reversal of 67653061691 is 19616035676.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67653061691 - 2² = 67653061687 is a prime.

It is not a weakly prime, because it can be changed into another prime (67653061291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33826530845 + 33826530846.

It is an arithmetic number, because the mean of its divisors is an integer number (33826530846).

Almost surely, 2^67653061691 is an apocalyptic number.

67653061691 is a deficient number, since it is larger than the sum of its proper divisors (1).

67653061691 is an equidigital number, since it uses as much as digits as its factorization.

67653061691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 67653061691 in words is "sixty-seven billion, six hundred fifty-three million, sixty-one thousand, six hundred ninety-one".