66750329 has 2 divisors, whose sum is σ = 66750330. Its totient is φ = 66750328.

The previous prime is 66750269. The next prime is 66750349. The reversal of 66750329 is 92305766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 11916304 = 7405^2 + 3452^2 .

It is a cyclic number.

It is not a de Polignac number, because 66750329 - 2²⁴ = 49973113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66750292 and 66750301.

It is not a weakly prime, because it can be changed into another prime (66750349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33375164 + 33375165.

It is an arithmetic number, because the mean of its divisors is an integer number (33375165).

Almost surely, 2^66750329 is an apocalyptic number.

It is an amenable number.

66750329 is a deficient number, since it is larger than the sum of its proper divisors (1).

66750329 is an equidigital number, since it uses as much as digits as its factorization.

66750329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 66750329 is about 8170.0874536323. The cubic root of 66750329 is about 405.6496792051.

The spelling of 66750329 in words is "sixty-six million, seven hundred fifty thousand, three hundred twenty-nine".