266440087 has 2 divisors, whose sum is σ = 266440088. Its totient is φ = 266440086.

The previous prime is 266440079. The next prime is 266440103. The reversal of 266440087 is 780044662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266440087 - 2³ = 266440079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266440007) 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, 133220043 + 133220044.

It is an arithmetic number, because the mean of its divisors is an integer number (133220044).

Almost surely, 2^266440087 is an apocalyptic number.

266440087 is a deficient number, since it is larger than the sum of its proper divisors (1).

266440087 is an equidigital number, since it uses as much as digits as its factorization.

266440087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 266440087 is about 16322.9925871453. The cubic root of 266440087 is about 643.4772378617.

The spelling of 266440087 in words is "two hundred sixty-six million, four hundred forty thousand, eighty-seven".