275666563 has 2 divisors, whose sum is σ = 275666564. Its totient is φ = 275666562.

The previous prime is 275666527. The next prime is 275666591. The reversal of 275666563 is 365666572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 275666563 - 2¹³ = 275658371 is a prime.

It is not a weakly prime, because it can be changed into another prime (275666263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137833281 + 137833282.

It is an arithmetic number, because the mean of its divisors is an integer number (137833282).

Almost surely, 2^275666563 is an apocalyptic number.

275666563 is a deficient number, since it is larger than the sum of its proper divisors (1).

275666563 is an equidigital number, since it uses as much as digits as its factorization.

275666563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 46.

The square root of 275666563 is about 16603.2094186636. The cubic root of 275666563 is about 650.8207092686.

Subtracting 275666563 from its reverse (365666572), we obtain a palindrome (90000009).

The spelling of 275666563 in words is "two hundred seventy-five million, six hundred sixty-six thousand, five hundred sixty-three".