665000027 has 2 divisors, whose sum is σ = 665000028. Its totient is φ = 665000026.

The previous prime is 664999949. The next prime is 665000029. The reversal of 665000027 is 720000566.

665000027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665000027 is a prime.

Together with 665000029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (665000029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332500013 + 332500014.

It is an arithmetic number, because the mean of its divisors is an integer number (332500014).

Almost surely, 2^665000027 is an apocalyptic number.

665000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

665000027 is an equidigital number, since it uses as much as digits as its factorization.

665000027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 665000027 is about 25787.5944399628. The cubic root of 665000027 is about 872.8518853316.

The spelling of 665000027 in words is "six hundred sixty-five million, twenty-seven", and thus it is an aban number.