266687228597 has 2 divisors, whose sum is σ = 266687228598. Its totient is φ = 266687228596.

The previous prime is 266687228531. The next prime is 266687228603. The reversal of 266687228597 is 795822786662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205572466801 + 61114761796 = 453401^2 + 247214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266687228597 is a prime.

It is a super-2 number, since 2×266687228597² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266687218597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133343614298 + 133343614299.

It is an arithmetic number, because the mean of its divisors is an integer number (133343614299).

Almost surely, 2^266687228597 is an apocalyptic number.

It is an amenable number.

266687228597 is a deficient number, since it is larger than the sum of its proper divisors (1).

266687228597 is an equidigital number, since it uses as much as digits as its factorization.

266687228597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243855360, while the sum is 68.

The spelling of 266687228597 in words is "two hundred sixty-six billion, six hundred eighty-seven million, two hundred twenty-eight thousand, five hundred ninety-seven".