266055317663 has 4 divisors (see below), whose sum is σ = 266298736248. Its totient is φ = 265811899080.

The previous prime is 266055317641. The next prime is 266055317669. The reversal of 266055317663 is 366713550662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266055317663 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 (266055317669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121707653 + ... + 121709838.

It is an arithmetic number, because the mean of its divisors is an integer number (66574684062).

Almost surely, 2^266055317663 is an apocalyptic number.

266055317663 is a deficient number, since it is larger than the sum of its proper divisors (243418585).

266055317663 is a wasteful number, since it uses less digits than its factorization.

266055317663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243418584.

The product of its (nonzero) digits is 4082400, while the sum is 50.

The spelling of 266055317663 in words is "two hundred sixty-six billion, fifty-five million, three hundred seventeen thousand, six hundred sixty-three".