665056027 has 2 divisors, whose sum is σ = 665056028. Its totient is φ = 665056026.

The previous prime is 665056001. The next prime is 665056087. The reversal of 665056027 is 720650566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665056027 - 2²³ = 656667419 is a prime.

It is not a weakly prime, because it can be changed into another prime (665056087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332528013 + 332528014.

It is an arithmetic number, because the mean of its divisors is an integer number (332528014).

Almost surely, 2^665056027 is an apocalyptic number.

665056027 is a deficient number, since it is larger than the sum of its proper divisors (1).

665056027 is an equidigital number, since it uses as much as digits as its factorization.

665056027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 665056027 is about 25788.6802105110. The cubic root of 665056027 is about 872.8763857485.

The spelling of 665056027 in words is "six hundred sixty-five million, fifty-six thousand, twenty-seven".