526166668326881 has 2 divisors, whose sum is σ = 526166668326882. Its totient is φ = 526166668326880.

The previous prime is 526166668326863. The next prime is 526166668326911. The reversal of 526166668326881 is 188623866661625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520637393550400 + 5529274776481 = 22817480^2 + 2351441^2 .

It is a cyclic number.

It is not a de Polignac number, because 526166668326881 - 2¹⁴ = 526166668310497 is a prime.

It is a super-2 number, since 2×526166668326881² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 526166668326799 and 526166668326808.

It is not a weakly prime, because it can be changed into another prime (526166668326811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263083334163440 + 263083334163441.

It is an arithmetic number, because the mean of its divisors is an integer number (263083334163441).

Almost surely, 2^{526166668326881} is an apocalyptic number.

It is an amenable number.

526166668326881 is a deficient number, since it is larger than the sum of its proper divisors (1).

526166668326881 is an equidigital number, since it uses as much as digits as its factorization.

526166668326881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1433272320, while the sum is 74.

The spelling of 526166668326881 in words is "five hundred twenty-six trillion, one hundred sixty-six billion, six hundred sixty-eight million, three hundred twenty-six thousand, eight hundred eighty-one".