266057049971551 has 2 divisors, whose sum is σ = 266057049971552. Its totient is φ = 266057049971550.

The previous prime is 266057049971533. The next prime is 266057049971567. The reversal of 266057049971551 is 155179940750662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266057049971551 - 2⁹ = 266057049971039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266057049971591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133028524985775 + 133028524985776.

It is an arithmetic number, because the mean of its divisors is an integer number (133028524985776).

Almost surely, 2^{266057049971551} is an apocalyptic number.

266057049971551 is a deficient number, since it is larger than the sum of its proper divisors (1).

266057049971551 is an equidigital number, since it uses as much as digits as its factorization.

266057049971551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884000, while the sum is 67.

The spelling of 266057049971551 in words is "two hundred sixty-six trillion, fifty-seven billion, forty-nine million, nine hundred seventy-one thousand, five hundred fifty-one".