266697149 has 2 divisors, whose sum is σ = 266697150. Its totient is φ = 266697148.

The previous prime is 266697143. The next prime is 266697161. The reversal of 266697149 is 941796662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198105625 + 68591524 = 14075^2 + 8282^2 .

It is a cyclic number.

It is not a de Polignac number, because 266697149 - 2⁸ = 266696893 is a prime.

It is a super-2 number, since 2×266697149² = 142254738569456402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266697097 and 266697106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266697143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133348574 + 133348575.

It is an arithmetic number, because the mean of its divisors is an integer number (133348575).

Almost surely, 2^266697149 is an apocalyptic number.

It is an amenable number.

266697149 is a deficient number, since it is larger than the sum of its proper divisors (1).

266697149 is an equidigital number, since it uses as much as digits as its factorization.

266697149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 266697149 is about 16330.8649189196. The cubic root of 266697149 is about 643.6841141104.

The spelling of 266697149 in words is "two hundred sixty-six million, six hundred ninety-seven thousand, one hundred forty-nine".