266661045226423 has 2 divisors, whose sum is σ = 266661045226424. Its totient is φ = 266661045226422.

The previous prime is 266661045226421. The next prime is 266661045226483. The reversal of 266661045226423 is 324622540166662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266661045226423 - 2¹ = 266661045226421 is a prime.

It is a super-2 number, since 2×266661045226423² (a number of 30 digits) contains 22 as substring.

Together with 266661045226421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266661045226421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133330522613211 + 133330522613212.

It is an arithmetic number, because the mean of its divisors is an integer number (133330522613212).

Almost surely, 2^{266661045226423} is an apocalyptic number.

266661045226423 is a deficient number, since it is larger than the sum of its proper divisors (1).

266661045226423 is an equidigital number, since it uses as much as digits as its factorization.

266661045226423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 55.

The spelling of 266661045226423 in words is "two hundred sixty-six trillion, six hundred sixty-one billion, forty-five million, two hundred twenty-six thousand, four hundred twenty-three".