266642674481 has 2 divisors, whose sum is σ = 266642674482. Its totient is φ = 266642674480.

The previous prime is 266642674477. The next prime is 266642674531. The reversal of 266642674481 is 184476246662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170160375025 + 96482299456 = 412505^2 + 310616^2 .

It is a cyclic number.

It is not a de Polignac number, because 266642674481 - 2² = 266642674477 is a prime.

It is a super-2 number, since 2×266642674481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266642674381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133321337240 + 133321337241.

It is an arithmetic number, because the mean of its divisors is an integer number (133321337241).

Almost surely, 2^266642674481 is an apocalyptic number.

It is an amenable number.

266642674481 is a deficient number, since it is larger than the sum of its proper divisors (1).

266642674481 is an equidigital number, since it uses as much as digits as its factorization.

266642674481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18579456, while the sum is 56.

The spelling of 266642674481 in words is "two hundred sixty-six billion, six hundred forty-two million, six hundred seventy-four thousand, four hundred eighty-one".