275666591 has 2 divisors, whose sum is σ = 275666592. Its totient is φ = 275666590.

The previous prime is 275666563. The next prime is 275666603. The reversal of 275666591 is 195666572.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 275666591 - 2⁶ = 275666527 is a prime.

It is a super-2 number, since 2×275666591² = 151984138787122562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275666191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137833295 + 137833296.

It is an arithmetic number, because the mean of its divisors is an integer number (137833296).

Almost surely, 2^275666591 is an apocalyptic number.

275666591 is a deficient number, since it is larger than the sum of its proper divisors (1).

275666591 is an equidigital number, since it uses as much as digits as its factorization.

275666591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 275666591 is about 16603.2102618741. The cubic root of 275666591 is about 650.8207313037.

The spelling of 275666591 in words is "two hundred seventy-five million, six hundred sixty-six thousand, five hundred ninety-one".