67428678127081 has 2 divisors, whose sum is σ = 67428678127082. Its totient is φ = 67428678127080.

The previous prime is 67428678126937. The next prime is 67428678127087. The reversal of 67428678127081 is 18072187682476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57868578979600 + 9560099147481 = 7607140^2 + 3091941^2 .

It is a cyclic number.

It is not a de Polignac number, because 67428678127081 - 2⁹ = 67428678126569 is a prime.

It is a super-2 number, since 2×67428678127081² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67428678126998 and 67428678127016.

It is not a weakly prime, because it can be changed into another prime (67428678127087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33714339063540 + 33714339063541.

It is an arithmetic number, because the mean of its divisors is an integer number (33714339063541).

Almost surely, 2^{67428678127081} is an apocalyptic number.

It is an amenable number.

67428678127081 is a deficient number, since it is larger than the sum of its proper divisors (1).

67428678127081 is an equidigital number, since it uses as much as digits as its factorization.

67428678127081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101154816, while the sum is 67.

The spelling of 67428678127081 in words is "sixty-seven trillion, four hundred twenty-eight billion, six hundred seventy-eight million, one hundred twenty-seven thousand, eighty-one".