266687704640927 has 2 divisors, whose sum is σ = 266687704640928. Its totient is φ = 266687704640926.

The previous prime is 266687704640867. The next prime is 266687704641041. The reversal of 266687704640927 is 729046407786662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266687704640927 - 2¹⁴ = 266687704624543 is a prime.

It is a super-2 number, since 2×266687704640927² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266687704640327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133343852320463 + 133343852320464.

It is an arithmetic number, because the mean of its divisors is an integer number (133343852320464).

Almost surely, 2^{266687704640927} is an apocalyptic number.

266687704640927 is a deficient number, since it is larger than the sum of its proper divisors (1).

266687704640927 is an equidigital number, since it uses as much as digits as its factorization.

266687704640927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048385024, while the sum is 74.

The spelling of 266687704640927 in words is "two hundred sixty-six trillion, six hundred eighty-seven billion, seven hundred four million, six hundred forty thousand, nine hundred twenty-seven".