66666330629 has 2 divisors, whose sum is σ = 66666330630. Its totient is φ = 66666330628.

The previous prime is 66666330593. The next prime is 66666330631. The reversal of 66666330629 is 92603366666.

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., 33662341729 + 33003988900 = 183473^2 + 181670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66666330629 is a prime.

Together with 66666330631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66666339629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333165314 + 33333165315.

It is an arithmetic number, because the mean of its divisors is an integer number (33333165315).

Almost surely, 2^66666330629 is an apocalyptic number.

It is an amenable number.

66666330629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66666330629 is an equidigital number, since it uses as much as digits as its factorization.

66666330629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 53.

The spelling of 66666330629 in words is "sixty-six billion, six hundred sixty-six million, three hundred thirty thousand, six hundred twenty-nine".