66195707833 has 2 divisors, whose sum is σ = 66195707834. Its totient is φ = 66195707832.

The previous prime is 66195707801. The next prime is 66195707861. The reversal of 66195707833 is 33870759166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64611030969 + 1584676864 = 254187^2 + 39808^2 .

It is a cyclic number.

It is not a de Polignac number, because 66195707833 - 2⁵ = 66195707801 is a prime.

It is not a weakly prime, because it can be changed into another prime (66195707933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33097853916 + 33097853917.

It is an arithmetic number, because the mean of its divisors is an integer number (33097853917).

Almost surely, 2^66195707833 is an apocalyptic number.

It is an amenable number.

66195707833 is a deficient number, since it is larger than the sum of its proper divisors (1).

66195707833 is an equidigital number, since it uses as much as digits as its factorization.

66195707833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 66195707833 in words is "sixty-six billion, one hundred ninety-five million, seven hundred seven thousand, eight hundred thirty-three".