266705137 has 2 divisors, whose sum is σ = 266705138. Its totient is φ = 266705136.

The previous prime is 266705111. The next prime is 266705149. The reversal of 266705137 is 731507662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264517696 + 2187441 = 16264^2 + 1479^2 .

It is a cyclic number.

It is not a de Polignac number, because 266705137 - 2⁷ = 266705009 is a prime.

It is a super-2 number, since 2×266705137² = 142263260204377538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266705096 and 266705105.

It is not a weakly prime, because it can be changed into another prime (266705107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133352568 + 133352569.

It is an arithmetic number, because the mean of its divisors is an integer number (133352569).

Almost surely, 2^266705137 is an apocalyptic number.

It is an amenable number.

266705137 is a deficient number, since it is larger than the sum of its proper divisors (1).

266705137 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 11 representation: 266705137 = (127603576)₁₁.

266705137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 266705137 is about 16331.1094846615. The cubic root of 266705137 is about 643.6905404975.

The spelling of 266705137 in words is "two hundred sixty-six million, seven hundred five thousand, one hundred thirty-seven".