66683423 has 2 divisors, whose sum is σ = 66683424. Its totient is φ = 66683422.

The previous prime is 66683389. The next prime is 66683437. The reversal of 66683423 is 32438666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66683423 - 2⁶ = 66683359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66683473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33341711 + 33341712.

It is an arithmetic number, because the mean of its divisors is an integer number (33341712).

Almost surely, 2^66683423 is an apocalyptic number.

66683423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66683423 is an equidigital number, since it uses as much as digits as its factorization.

66683423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The square root of 66683423 is about 8165.9918564740. The cubic root of 66683423 is about 405.5141019938.

The spelling of 66683423 in words is "sixty-six million, six hundred eighty-three thousand, four hundred twenty-three".