266680306121 has 4 divisors (see below), whose sum is σ = 267282293712. Its totient is φ = 266078318532.

The previous prime is 266680306111. The next prime is 266680306129. The reversal of 266680306121 is 121603086662.

266680306121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266680306121 - 2¹⁸ = 266680043977 is a prime.

It is a super-2 number, since 2×266680306121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266680306129) 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 in 3 ways as a sum of consecutive naturals, for example, 300993131 + ... + 300994016.

It is an arithmetic number, because the mean of its divisors is an integer number (66820573428).

Almost surely, 2^266680306121 is an apocalyptic number.

It is an amenable number.

266680306121 is a deficient number, since it is larger than the sum of its proper divisors (601987591).

266680306121 is an equidigital number, since it uses as much as digits as its factorization.

266680306121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601987590.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 266680306121 in words is "two hundred sixty-six billion, six hundred eighty million, three hundred six thousand, one hundred twenty-one".