266872237 has 2 divisors, whose sum is σ = 266872238. Its totient is φ = 266872236.

The previous prime is 266872223. The next prime is 266872357. The reversal of 266872237 is 732278662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171243396 + 95628841 = 13086^2 + 9779^2 .

It is a cyclic number.

It is not a de Polignac number, because 266872237 - 2²³ = 258483629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266872193 and 266872202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266872217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133436118 + 133436119.

It is an arithmetic number, because the mean of its divisors is an integer number (133436119).

Almost surely, 2^266872237 is an apocalyptic number.

It is an amenable number.

266872237 is a deficient number, since it is larger than the sum of its proper divisors (1).

266872237 is an equidigital number, since it uses as much as digits as its factorization.

266872237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The square root of 266872237 is about 16336.2246862609. The cubic root of 266872237 is about 643.8249439000.

The spelling of 266872237 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, two hundred thirty-seven".