66197530229 has 2 divisors, whose sum is σ = 66197530230. Its totient is φ = 66197530228.

The previous prime is 66197530151. The next prime is 66197530271. The reversal of 66197530229 is 92203579166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46267149604 + 19930380625 = 215098^2 + 141175^2 .

It is a cyclic number.

It is not a de Polignac number, because 66197530229 - 2⁸ = 66197529973 is a prime.

It is a super-2 number, since 2×66197530229² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66197532229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33098765114 + 33098765115.

It is an arithmetic number, because the mean of its divisors is an integer number (33098765115).

Almost surely, 2^66197530229 is an apocalyptic number.

It is an amenable number.

66197530229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66197530229 is an equidigital number, since it uses as much as digits as its factorization.

66197530229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 66197530229 in words is "sixty-six billion, one hundred ninety-seven million, five hundred thirty thousand, two hundred twenty-nine".