666703423 has 2 divisors, whose sum is σ = 666703424. Its totient is φ = 666703422.

The previous prime is 666703327. The next prime is 666703441. The reversal of 666703423 is 324307666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666703423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666703493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333351711 + 333351712.

It is an arithmetic number, because the mean of its divisors is an integer number (333351712).

Almost surely, 2^666703423 is an apocalyptic number.

666703423 is a deficient number, since it is larger than the sum of its proper divisors (1).

666703423 is an equidigital number, since it uses as much as digits as its factorization.

666703423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 666703423 is about 25820.6007482398. The cubic root of 666703423 is about 873.5965192486.

The spelling of 666703423 in words is "six hundred sixty-six million, seven hundred three thousand, four hundred twenty-three".