66860611 has 2 divisors, whose sum is σ = 66860612. Its totient is φ = 66860610.

The previous prime is 66860603. The next prime is 66860641. The reversal of 66860611 is 11606866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66860611 - 2³ = 66860603 is a prime.

It is not a weakly prime, because it can be changed into another prime (66860641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33430305 + 33430306.

It is an arithmetic number, because the mean of its divisors is an integer number (33430306).

Almost surely, 2^66860611 is an apocalyptic number.

66860611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66860611 is an equidigital number, since it uses as much as digits as its factorization.

66860611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 66860611 is about 8176.8338004389. The cubic root of 66860611 is about 405.8729552264.

The spelling of 66860611 in words is "sixty-six million, eight hundred sixty thousand, six hundred eleven".