266787461 has 2 divisors, whose sum is σ = 266787462. Its totient is φ = 266787460.

The previous prime is 266787449. The next prime is 266787473. The reversal of 266787461 is 164787662.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (266787449) and next prime (266787473).

It can be written as a sum of positive squares in only one way, i.e., 225750625 + 41036836 = 15025^2 + 6406^2 .

It is a cyclic number.

It is not a de Polignac number, because 266787461 - 2⁶ = 266787397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266780461) 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, 133393730 + 133393731.

It is an arithmetic number, because the mean of its divisors is an integer number (133393731).

Almost surely, 2^266787461 is an apocalyptic number.

It is an amenable number.

266787461 is a deficient number, since it is larger than the sum of its proper divisors (1).

266787461 is an equidigital number, since it uses as much as digits as its factorization.

266787461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 266787461 is about 16333.6297558136. The cubic root of 266787461 is about 643.7567631049.

The spelling of 266787461 in words is "two hundred sixty-six million, seven hundred eighty-seven thousand, four hundred sixty-one".