266141549 has 2 divisors, whose sum is σ = 266141550. Its totient is φ = 266141548.

The previous prime is 266141503. The next prime is 266141591. The reversal of 266141549 is 945141662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159845449 + 106296100 = 12643^2 + 10310^2 .

It is a cyclic number.

It is not a de Polignac number, because 266141549 - 2²⁴ = 249364333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265141549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133070774 + 133070775.

It is an arithmetic number, because the mean of its divisors is an integer number (133070775).

Almost surely, 2^266141549 is an apocalyptic number.

It is an amenable number.

266141549 is a deficient number, since it is larger than the sum of its proper divisors (1).

266141549 is an equidigital number, since it uses as much as digits as its factorization.

266141549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 266141549 is about 16313.8453161724. The cubic root of 266141549 is about 643.2368158306.

The spelling of 266141549 in words is "two hundred sixty-six million, one hundred forty-one thousand, five hundred forty-nine".