666702233 has 2 divisors, whose sum is σ = 666702234. Its totient is φ = 666702232.

The previous prime is 666702221. The next prime is 666702247. The reversal of 666702233 is 332207666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 658794889 + 7907344 = 25667^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 666702233 - 2⁴ = 666702217 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 = 666702193 and 666702202.

It is not a weakly prime, because it can be changed into another prime (666702203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333351116 + 333351117.

It is an arithmetic number, because the mean of its divisors is an integer number (333351117).

Almost surely, 2^666702233 is an apocalyptic number.

It is an amenable number.

666702233 is a deficient number, since it is larger than the sum of its proper divisors (1).

666702233 is an equidigital number, since it uses as much as digits as its factorization.

666702233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 666702233 is about 25820.5777046138. The cubic root of 666702233 is about 873.5959994870.

Adding to 666702233 its reverse (332207666), we get a palindrome (998909899).

The spelling of 666702233 in words is "six hundred sixty-six million, seven hundred two thousand, two hundred thirty-three".