66613307 has 2 divisors, whose sum is σ = 66613308. Its totient is φ = 66613306.

The previous prime is 66613289. The next prime is 66613367. The reversal of 66613307 is 70331666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66613307 - 2⁸ = 66613051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66613367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33306653 + 33306654.

It is an arithmetic number, because the mean of its divisors is an integer number (33306654).

Almost surely, 2^66613307 is an apocalyptic number.

66613307 is a deficient number, since it is larger than the sum of its proper divisors (1).

66613307 is an equidigital number, since it uses as much as digits as its factorization.

66613307 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 32.

The square root of 66613307 is about 8161.6975562685. The cubic root of 66613307 is about 405.3719227391.

The spelling of 66613307 in words is "sixty-six million, six hundred thirteen thousand, three hundred seven".