666163301 has 2 divisors, whose sum is σ = 666163302. Its totient is φ = 666163300.

The previous prime is 666163243. The next prime is 666163331. The reversal of 666163301 is 103361666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633730276 + 32433025 = 25174^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 666163301 - 2¹⁸ = 665901157 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 (666163331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333081650 + 333081651.

It is an arithmetic number, because the mean of its divisors is an integer number (333081651).

Almost surely, 2^666163301 is an apocalyptic number.

It is an amenable number.

666163301 is a deficient number, since it is larger than the sum of its proper divisors (1).

666163301 is an equidigital number, since it uses as much as digits as its factorization.

666163301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 666163301 is about 25810.1394998167. The cubic root of 666163301 is about 873.3605441703.

The spelling of 666163301 in words is "six hundred sixty-six million, one hundred sixty-three thousand, three hundred one".