266315563 has 2 divisors, whose sum is σ = 266315564. Its totient is φ = 266315562.

The previous prime is 266315561. The next prime is 266315573. The reversal of 266315563 is 365513662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266315563 - 2¹ = 266315561 is a prime.

Together with 266315561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (266315561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133157781 + 133157782.

It is an arithmetic number, because the mean of its divisors is an integer number (133157782).

Almost surely, 2^266315563 is an apocalyptic number.

266315563 is a deficient number, since it is larger than the sum of its proper divisors (1).

266315563 is an equidigital number, since it uses as much as digits as its factorization.

266315563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 266315563 is about 16319.1777672774. The cubic root of 266315563 is about 643.3769766151.

The spelling of 266315563 in words is "two hundred sixty-six million, three hundred fifteen thousand, five hundred sixty-three".