66630611 has 2 divisors, whose sum is σ = 66630612. Its totient is φ = 66630610.

The previous prime is 66630601. The next prime is 66630649. The reversal of 66630611 is 11603666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66630611 - 2¹⁰ = 66629587 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66630601) 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, 33315305 + 33315306.

It is an arithmetic number, because the mean of its divisors is an integer number (33315306).

Almost surely, 2^66630611 is an apocalyptic number.

66630611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66630611 is an equidigital number, since it uses as much as digits as its factorization.

66630611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66630611 is about 8162.7575610207. The cubic root of 66630611 is about 405.4070205735.

The spelling of 66630611 in words is "sixty-six million, six hundred thirty thousand, six hundred eleven".