266004135654281 has 2 divisors, whose sum is σ = 266004135654282. Its totient is φ = 266004135654280.

The previous prime is 266004135654251. The next prime is 266004135654359. The reversal of 266004135654281 is 182456531400662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201117324749056 + 64886810905225 = 14181584^2 + 8055235^2 .

It is a cyclic number.

It is not a de Polignac number, because 266004135654281 - 2⁶ = 266004135654217 is a prime.

It is a super-2 number, since 2×266004135654281² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266004135654251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133002067827140 + 133002067827141.

It is an arithmetic number, because the mean of its divisors is an integer number (133002067827141).

Almost surely, 2^{266004135654281} is an apocalyptic number.

It is an amenable number.

266004135654281 is a deficient number, since it is larger than the sum of its proper divisors (1).

266004135654281 is an equidigital number, since it uses as much as digits as its factorization.

266004135654281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 266004135654281 in words is "two hundred sixty-six trillion, four billion, one hundred thirty-five million, six hundred fifty-four thousand, two hundred eighty-one".