1266755593447 has 2 divisors, whose sum is σ = 1266755593448. Its totient is φ = 1266755593446.

The previous prime is 1266755593417. The next prime is 1266755593451. The reversal of 1266755593447 is 7443955576621.

It is a strong prime.

It is an emirp because it is prime and its reverse (7443955576621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266755593447 is a prime.

It is a super-2 number, since 2×1266755593447² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266755593417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633377796723 + 633377796724.

It is an arithmetic number, because the mean of its divisors is an integer number (633377796724).

Almost surely, 2^{1266755593447} is an apocalyptic number.

1266755593447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266755593447 is an equidigital number, since it uses as much as digits as its factorization.

1266755593447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512000, while the sum is 64.

The spelling of 1266755593447 in words is "one trillion, two hundred sixty-six billion, seven hundred fifty-five million, five hundred ninety-three thousand, four hundred forty-seven".