66911153 has 2 divisors, whose sum is σ = 66911154. Its totient is φ = 66911152.

The previous prime is 66911147. The next prime is 66911177. The reversal of 66911153 is 35111966.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57032704 + 9878449 = 7552^2 + 3143^2 .

It is a cyclic number.

It is not a de Polignac number, because 66911153 - 2⁴ = 66911137 is a prime.

It is not a weakly prime, because it can be changed into another prime (66911353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33455576 + 33455577.

It is an arithmetic number, because the mean of its divisors is an integer number (33455577).

Almost surely, 2^66911153 is an apocalyptic number.

It is an amenable number.

66911153 is a deficient number, since it is larger than the sum of its proper divisors (1).

66911153 is an equidigital number, since it uses as much as digits as its factorization.

66911153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 66911153 is about 8179.9237771510. The cubic root of 66911153 is about 405.9752000997.

The spelling of 66911153 in words is "sixty-six million, nine hundred eleven thousand, one hundred fifty-three".