66765029 has 2 divisors, whose sum is σ = 66765030. Its totient is φ = 66765028.

The previous prime is 66765011. The next prime is 66765037. The reversal of 66765029 is 92056766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 16129 = 8170^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 66765029 - 2⁸ = 66764773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66765059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33382514 + 33382515.

It is an arithmetic number, because the mean of its divisors is an integer number (33382515).

Almost surely, 2^66765029 is an apocalyptic number.

It is an amenable number.

66765029 is a deficient number, since it is larger than the sum of its proper divisors (1).

66765029 is an equidigital number, since it uses as much as digits as its factorization.

66765029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 66765029 is about 8170.9870272813. The cubic root of 66765029 is about 405.6794549016.

The spelling of 66765029 in words is "sixty-six million, seven hundred sixty-five thousand, twenty-nine".