67367340661 has 2 divisors, whose sum is σ = 67367340662. Its totient is φ = 67367340660.

The previous prime is 67367340643. The next prime is 67367340701. The reversal of 67367340661 is 16604376376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67272278161 + 95062500 = 259369^2 + 9750^2 .

It is a cyclic number.

It is not a de Polignac number, because 67367340661 - 2⁹ = 67367340149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67367340611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33683670330 + 33683670331.

It is an arithmetic number, because the mean of its divisors is an integer number (33683670331).

Almost surely, 2^67367340661 is an apocalyptic number.

It is an amenable number.

67367340661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67367340661 is an equidigital number, since it uses as much as digits as its factorization.

67367340661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 49.

The spelling of 67367340661 in words is "sixty-seven billion, three hundred sixty-seven million, three hundred forty thousand, six hundred sixty-one".