266357854481 has 2 divisors, whose sum is σ = 266357854482. Its totient is φ = 266357854480.

The previous prime is 266357854459. The next prime is 266357854489. The reversal of 266357854481 is 184458753662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218197357456 + 48160497025 = 467116^2 + 219455^2 .

It is a cyclic number.

It is not a de Polignac number, because 266357854481 - 2¹⁰ = 266357853457 is a prime.

It is a super-2 number, since 2×266357854481² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266357854481.

It is not a weakly prime, because it can be changed into another prime (266357854489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133178927240 + 133178927241.

It is an arithmetic number, because the mean of its divisors is an integer number (133178927241).

Almost surely, 2^266357854481 is an apocalyptic number.

It is an amenable number.

266357854481 is a deficient number, since it is larger than the sum of its proper divisors (1).

266357854481 is an equidigital number, since it uses as much as digits as its factorization.

266357854481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38707200, while the sum is 59.

The spelling of 266357854481 in words is "two hundred sixty-six billion, three hundred fifty-seven million, eight hundred fifty-four thousand, four hundred eighty-one".