66238327 has 2 divisors, whose sum is σ = 66238328. Its totient is φ = 66238326.

The previous prime is 66238309. The next prime is 66238343. The reversal of 66238327 is 72383266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66238327 - 2¹⁹ = 65714039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66238027) 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, 33119163 + 33119164.

It is an arithmetic number, because the mean of its divisors is an integer number (33119164).

Almost surely, 2^66238327 is an apocalyptic number.

66238327 is a deficient number, since it is larger than the sum of its proper divisors (1).

66238327 is an equidigital number, since it uses as much as digits as its factorization.

66238327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 66238327 is about 8138.6931997711. The cubic root of 66238327 is about 404.6098503603.

The spelling of 66238327 in words is "sixty-six million, two hundred thirty-eight thousand, three hundred twenty-seven".