67799818426391 has 2 divisors, whose sum is σ = 67799818426392. Its totient is φ = 67799818426390.

The previous prime is 67799818426357. The next prime is 67799818426421. The reversal of 67799818426391 is 19362481899776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67799818426391 - 2²⁶ = 67799751317527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67799818420391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33899909213195 + 33899909213196.

It is an arithmetic number, because the mean of its divisors is an integer number (33899909213196).

Almost surely, 2^{67799818426391} is an apocalyptic number.

67799818426391 is a deficient number, since it is larger than the sum of its proper divisors (1).

67799818426391 is an equidigital number, since it uses as much as digits as its factorization.

67799818426391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975228416, while the sum is 80.

The spelling of 67799818426391 in words is "sixty-seven trillion, seven hundred ninety-nine billion, eight hundred eighteen million, four hundred twenty-six thousand, three hundred ninety-one".