266681151361 has 8 divisors (see below), whose sum is σ = 275434969320. Its totient is φ = 258065188992.

The previous prime is 266681151343. The next prime is 266681151371. The reversal of 266681151361 is 163151186662.

It can be written as a sum of positive squares in 4 ways, for example, as 12432250000 + 254248901361 = 111500^2 + 504231^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 266681151361 - 2¹¹ = 266681149313 is a prime.

It is a super-2 number, since 2×266681151361² (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 (266681151371) 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 7 ways as a sum of consecutive naturals, for example, 34459966 + ... + 34467703.

It is an arithmetic number, because the mean of its divisors is an integer number (34429371165).

Almost surely, 2^266681151361 is an apocalyptic number.

It is an amenable number.

266681151361 is a deficient number, since it is larger than the sum of its proper divisors (8753817959).

266681151361 is an equidigital number, since it uses as much as digits as its factorization.

266681151361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68927795.

The product of its digits is 311040, while the sum is 46.

It can be divided in two parts, 2666811 and 51361, that added together give a palindrome (2718172).

The spelling of 266681151361 in words is "two hundred sixty-six billion, six hundred eighty-one million, one hundred fifty-one thousand, three hundred sixty-one".