266427912556511 has 24 divisors (see below), whose sum is σ = 292010808430320. Its totient is φ = 242879690880000.

The previous prime is 266427912556501. The next prime is 266427912556517. The reversal of 266427912556511 is 115655219724662.

It is a de Polignac number, because none of the positive numbers 2^k-266427912556511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266427912556517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79235240 + ... + 82529261.

It is an arithmetic number, because the mean of its divisors is an integer number (12167117017930).

Almost surely, 2^{266427912556511} is an apocalyptic number.

266427912556511 is a deficient number, since it is larger than the sum of its proper divisors (25582895873809).

266427912556511 is a wasteful number, since it uses less digits than its factorization.

266427912556511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161764715 (or 161764698 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 62.

The spelling of 266427912556511 in words is "two hundred sixty-six trillion, four hundred twenty-seven billion, nine hundred twelve million, five hundred fifty-six thousand, five hundred eleven".