665046611 has 2 divisors, whose sum is σ = 665046612. Its totient is φ = 665046610.

The previous prime is 665046581. The next prime is 665046617. The reversal of 665046611 is 116640566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665046611 - 2¹⁰ = 665045587 is a prime.

It is equal to p_34534655 and since 665046611 and 34534655 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (665046617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332523305 + 332523306.

It is an arithmetic number, because the mean of its divisors is an integer number (332523306).

Almost surely, 2^665046611 is an apocalyptic number.

665046611 is a deficient number, since it is larger than the sum of its proper divisors (1).

665046611 is an equidigital number, since it uses as much as digits as its factorization.

665046611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 665046611 is about 25788.4976491458. The cubic root of 665046611 is about 872.8722662746.

The spelling of 665046611 in words is "six hundred sixty-five million, forty-six thousand, six hundred eleven".