266340238442087 has 4 divisors (see below), whose sum is σ = 266357303892336. Its totient is φ = 266323172991840.

The previous prime is 266340238442023. The next prime is 266340238442099. The reversal of 266340238442087 is 780244832043662.

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

It is a cyclic number.

It is not a de Polignac number, because 266340238442087 - 2⁶ = 266340238442023 is a prime.

It is a super-2 number, since 2×266340238442087² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266340238444087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8532701714 + ... + 8532732927.

It is an arithmetic number, because the mean of its divisors is an integer number (66589325973084).

Almost surely, 2^{266340238442087} is an apocalyptic number.

266340238442087 is a deficient number, since it is larger than the sum of its proper divisors (17065450249).

266340238442087 is a wasteful number, since it uses less digits than its factorization.

266340238442087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17065450248.

The product of its (nonzero) digits is 74317824, while the sum is 59.

The spelling of 266340238442087 in words is "two hundred sixty-six trillion, three hundred forty billion, two hundred thirty-eight million, four hundred forty-two thousand, eighty-seven".