266386222081 has 8 divisors (see below), whose sum is σ = 304555912640. Its totient is φ = 228245160528.

The previous prime is 266386222057. The next prime is 266386222097. The reversal of 266386222081 is 180222683662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-266386222081 is a prime.

It is a super-2 number, since 2×266386222081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266386222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7137306 + ... + 7174531.

It is an arithmetic number, because the mean of its divisors is an integer number (38069489080).

Almost surely, 2^266386222081 is an apocalyptic number.

It is an amenable number.

266386222081 is a deficient number, since it is larger than the sum of its proper divisors (38169690559).

266386222081 is a wasteful number, since it uses less digits than its factorization.

266386222081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14314503.

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 266386222081 in words is "two hundred sixty-six billion, three hundred eighty-six million, two hundred twenty-two thousand, eighty-one".