266734997 has 2 divisors, whose sum is σ = 266734998. Its totient is φ = 266734996.

The previous prime is 266734987. The next prime is 266735009. The reversal of 266734997 is 799437662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218862436 + 47872561 = 14794^2 + 6919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266734997 is a prime.

It is a super-2 number, since 2×266734997² = 142295117249180018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266734927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133367498 + 133367499.

It is an arithmetic number, because the mean of its divisors is an integer number (133367499).

Almost surely, 2^266734997 is an apocalyptic number.

It is an amenable number.

266734997 is a deficient number, since it is larger than the sum of its proper divisors (1).

266734997 is an equidigital number, since it uses as much as digits as its factorization.

266734997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 53.

The square root of 266734997 is about 16332.0236651800. The cubic root of 266734997 is about 643.7145618849.

The spelling of 266734997 in words is "two hundred sixty-six million, seven hundred thirty-four thousand, nine hundred ninety-seven".