665312327 has 2 divisors, whose sum is σ = 665312328. Its totient is φ = 665312326.

The previous prime is 665312293. The next prime is 665312353. The reversal of 665312327 is 723213566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665312327 - 2²⁸ = 396876871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665312027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332656163 + 332656164.

It is an arithmetic number, because the mean of its divisors is an integer number (332656164).

Almost surely, 2^665312327 is an apocalyptic number.

665312327 is a deficient number, since it is larger than the sum of its proper divisors (1).

665312327 is an equidigital number, since it uses as much as digits as its factorization.

665312327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 665312327 is about 25793.6489663638. The cubic root of 665312327 is about 872.9885013577.

The spelling of 665312327 in words is "six hundred sixty-five million, three hundred twelve thousand, three hundred twenty-seven".