266272637 has 2 divisors, whose sum is σ = 266272638. Its totient is φ = 266272636.

The previous prime is 266272627. The next prime is 266272639. The reversal of 266272637 is 736272662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155475961 + 110796676 = 12469^2 + 10526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266272637 is a prime.

It is a super-2 number, since 2×266272637² = 141802234429867538, which contains 22 as substring.

Together with 266272639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 266272594 and 266272603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266272639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133136318 + 133136319.

It is an arithmetic number, because the mean of its divisors is an integer number (133136319).

Almost surely, 2^266272637 is an apocalyptic number.

It is an amenable number.

266272637 is a deficient number, since it is larger than the sum of its proper divisors (1).

266272637 is an equidigital number, since it uses as much as digits as its factorization.

266272637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 41.

The square root of 266272637 is about 16317.8625132093. The cubic root of 266272637 is about 643.3424072446.

The spelling of 266272637 in words is "two hundred sixty-six million, two hundred seventy-two thousand, six hundred thirty-seven".