665072927 has 2 divisors, whose sum is σ = 665072928. Its totient is φ = 665072926.

The previous prime is 665072917. The next prime is 665072953. The reversal of 665072927 is 729270566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665072927 - 2⁸ = 665072671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665072917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332536463 + 332536464.

It is an arithmetic number, because the mean of its divisors is an integer number (332536464).

Almost surely, 2^665072927 is an apocalyptic number.

665072927 is a deficient number, since it is larger than the sum of its proper divisors (1).

665072927 is an equidigital number, since it uses as much as digits as its factorization.

665072927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 665072927 is about 25789.0078715720. The cubic root of 665072927 is about 872.8837793541.

The spelling of 665072927 in words is "six hundred sixty-five million, seventy-two thousand, nine hundred twenty-seven".