666275117 has 2 divisors, whose sum is σ = 666275118. Its totient is φ = 666275116.

The previous prime is 666275081. The next prime is 666275189. The reversal of 666275117 is 711572666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338339236 + 327935881 = 18394^2 + 18109^2 .

It is a cyclic number.

It is not a de Polignac number, because 666275117 - 2²² = 662080813 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 (666275417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333137558 + 333137559.

It is an arithmetic number, because the mean of its divisors is an integer number (333137559).

Almost surely, 2^666275117 is an apocalyptic number.

It is an amenable number.

666275117 is a deficient number, since it is larger than the sum of its proper divisors (1).

666275117 is an equidigital number, since it uses as much as digits as its factorization.

666275117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 666275117 is about 25812.3055343764. The cubic root of 666275117 is about 873.4094061731.

The spelling of 666275117 in words is "six hundred sixty-six million, two hundred seventy-five thousand, one hundred seventeen".