67407406667791 has 2 divisors, whose sum is σ = 67407406667792. Its totient is φ = 67407406667790.

The previous prime is 67407406667707. The next prime is 67407406667803. The reversal of 67407406667791 is 19776660470476.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67407406667791 - 2²⁵ = 67407373113359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67407406667791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67407406667591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33703703333895 + 33703703333896.

It is an arithmetic number, because the mean of its divisors is an integer number (33703703333896).

Almost surely, 2^{67407406667791} is an apocalyptic number.

67407406667791 is a deficient number, since it is larger than the sum of its proper divisors (1).

67407406667791 is an equidigital number, since it uses as much as digits as its factorization.

67407406667791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448084224, while the sum is 70.

The spelling of 67407406667791 in words is "sixty-seven trillion, four hundred seven billion, four hundred six million, six hundred sixty-seven thousand, seven hundred ninety-one".