66630307 has 2 divisors, whose sum is σ = 66630308. Its totient is φ = 66630306.

The previous prime is 66630271. The next prime is 66630341. The reversal of 66630307 is 70303666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66630307 - 2²³ = 58241699 is a prime.

It is a super-3 number, since 3×66630307³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66630107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33315153 + 33315154.

It is an arithmetic number, because the mean of its divisors is an integer number (33315154).

Almost surely, 2^66630307 is an apocalyptic number.

66630307 is a deficient number, since it is larger than the sum of its proper divisors (1).

66630307 is an equidigital number, since it uses as much as digits as its factorization.

66630307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 66630307 is about 8162.7389398412. The cubic root of 66630307 is about 405.4064040204.

The spelling of 66630307 in words is "sixty-six million, six hundred thirty thousand, three hundred seven".