666016277 has 2 divisors, whose sum is σ = 666016278. Its totient is φ = 666016276.

The previous prime is 666016229. The next prime is 666016297. The reversal of 666016277 is 772610666.

666016277 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 can be written as a sum of positive squares in only one way, i.e., 382632721 + 283383556 = 19561^2 + 16834^2 .

It is a cyclic number.

It is not a de Polignac number, because 666016277 - 2¹² = 666012181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666016297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333008138 + 333008139.

It is an arithmetic number, because the mean of its divisors is an integer number (333008139).

Almost surely, 2^666016277 is an apocalyptic number.

It is an amenable number.

666016277 is a deficient number, since it is larger than the sum of its proper divisors (1).

666016277 is an equidigital number, since it uses as much as digits as its factorization.

666016277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 666016277 is about 25807.2911596704. The cubic root of 666016277 is about 873.2962884500.

The spelling of 666016277 in words is "six hundred sixty-six million, sixteen thousand, two hundred seventy-seven".