266006515045091 has 2 divisors, whose sum is σ = 266006515045092. Its totient is φ = 266006515045090.

The previous prime is 266006515045079. The next prime is 266006515045123. The reversal of 266006515045091 is 190540515600662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266006515045091 - 2²⁶ = 266006447936227 is a prime.

It is not a weakly prime, because it can be changed into another prime (266006515045291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133003257522545 + 133003257522546.

It is an arithmetic number, because the mean of its divisors is an integer number (133003257522546).

Almost surely, 2^{266006515045091} is an apocalyptic number.

266006515045091 is a deficient number, since it is larger than the sum of its proper divisors (1).

266006515045091 is an equidigital number, since it uses as much as digits as its factorization.

266006515045091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 266006515045091 in words is "two hundred sixty-six trillion, six billion, five hundred fifteen million, forty-five thousand, ninety-one".