26166056454757 has 2 divisors, whose sum is σ = 26166056454758. Its totient is φ = 26166056454756.

The previous prime is 26166056454751. The next prime is 26166056454793. The reversal of 26166056454757 is 75745465066162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20365670711556 + 5800385743201 = 4512834^2 + 2408399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26166056454757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26166056454751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13083028227378 + 13083028227379.

It is an arithmetic number, because the mean of its divisors is an integer number (13083028227379).

Almost surely, 2^{26166056454757} is an apocalyptic number.

It is an amenable number.

26166056454757 is a deficient number, since it is larger than the sum of its proper divisors (1).

26166056454757 is an equidigital number, since it uses as much as digits as its factorization.

26166056454757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016000, while the sum is 64.

The spelling of 26166056454757 in words is "twenty-six trillion, one hundred sixty-six billion, fifty-six million, four hundred fifty-four thousand, seven hundred fifty-seven".