66530029 has 2 divisors, whose sum is σ = 66530030. Its totient is φ = 66530028.

The previous prime is 66529997. The next prime is 66530041. The reversal of 66530029 is 92003566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59320804 + 7209225 = 7702^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 66530029 - 2⁵ = 66529997 is a prime.

It is equal to p_3925705 and since 66530029 and 3925705 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66531029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33265014 + 33265015.

It is an arithmetic number, because the mean of its divisors is an integer number (33265015).

Almost surely, 2^66530029 is an apocalyptic number.

It is an amenable number.

66530029 is a deficient number, since it is larger than the sum of its proper divisors (1).

66530029 is an equidigital number, since it uses as much as digits as its factorization.

66530029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 66530029 is about 8156.5942034651. The cubic root of 66530029 is about 405.2029242698.

The spelling of 66530029 in words is "sixty-six million, five hundred thirty thousand, twenty-nine".