666873353 has 2 divisors, whose sum is σ = 666873354. Its totient is φ = 666873352.

The previous prime is 666873329. The next prime is 666873359. The reversal of 666873353 is 353378666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665227264 + 1646089 = 25792^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 666873353 - 2¹⁴ = 666856969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666873298 and 666873307.

It is not a weakly prime, because it can be changed into another prime (666873359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333436676 + 333436677.

It is an arithmetic number, because the mean of its divisors is an integer number (333436677).

Almost surely, 2^666873353 is an apocalyptic number.

It is an amenable number.

666873353 is a deficient number, since it is larger than the sum of its proper divisors (1).

666873353 is an equidigital number, since it uses as much as digits as its factorization.

666873353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 47.

The square root of 666873353 is about 25823.8911281782. The cubic root of 666873353 is about 873.6707339798.

The spelling of 666873353 in words is "six hundred sixty-six million, eight hundred seventy-three thousand, three hundred fifty-three".