66358823 has 2 divisors, whose sum is σ = 66358824. Its totient is φ = 66358822.

The previous prime is 66358813. The next prime is 66358829. The reversal of 66358823 is 32885366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66358823 - 2⁴ = 66358807 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 (66358829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33179411 + 33179412.

It is an arithmetic number, because the mean of its divisors is an integer number (33179412).

Almost surely, 2^66358823 is an apocalyptic number.

66358823 is a deficient number, since it is larger than the sum of its proper divisors (1).

66358823 is an equidigital number, since it uses as much as digits as its factorization.

66358823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 66358823 is about 8146.0924988610. The cubic root of 66358823 is about 404.8550474509.

The spelling of 66358823 in words is "sixty-six million, three hundred fifty-eight thousand, eight hundred twenty-three".