266020664461 has 2 divisors, whose sum is σ = 266020664462. Its totient is φ = 266020664460.

The previous prime is 266020664453. The next prime is 266020664563. The reversal of 266020664461 is 164466020662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139431294025 + 126589370436 = 373405^2 + 355794^2 .

It is a cyclic number.

It is not a de Polignac number, because 266020664461 - 2³ = 266020664453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266020664431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133010332230 + 133010332231.

It is an arithmetic number, because the mean of its divisors is an integer number (133010332231).

Almost surely, 2^266020664461 is an apocalyptic number.

It is an amenable number.

266020664461 is a deficient number, since it is larger than the sum of its proper divisors (1).

266020664461 is an equidigital number, since it uses as much as digits as its factorization.

266020664461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 266020664461 in words is "two hundred sixty-six billion, twenty million, six hundred sixty-four thousand, four hundred sixty-one".