67243073761 has 2 divisors, whose sum is σ = 67243073762. Its totient is φ = 67243073760.

The previous prime is 67243073671. The next prime is 67243073813. The reversal of 67243073761 is 16737034276.

Together with previous prime (67243073671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64224230625 + 3018843136 = 253425^2 + 54944^2 .

It is a cyclic number.

It is not a de Polignac number, because 67243073761 - 2¹³ = 67243065569 is a prime.

It is not a weakly prime, because it can be changed into another prime (67243043761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33621536880 + 33621536881.

It is an arithmetic number, because the mean of its divisors is an integer number (33621536881).

Almost surely, 2^67243073761 is an apocalyptic number.

It is an amenable number.

67243073761 is a deficient number, since it is larger than the sum of its proper divisors (1).

67243073761 is an equidigital number, since it uses as much as digits as its factorization.

67243073761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 46.

The spelling of 67243073761 in words is "sixty-seven billion, two hundred forty-three million, seventy-three thousand, seven hundred sixty-one".