6660511065473 has 2 divisors, whose sum is σ = 6660511065474. Its totient is φ = 6660511065472.

The previous prime is 6660511065407. The next prime is 6660511065499. The reversal of 6660511065473 is 3745601150666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3532381168369 + 3128129897104 = 1879463^2 + 1768652^2 .

It is a cyclic number.

It is not a de Polignac number, because 6660511065473 - 2⁸ = 6660511065217 is a prime.

It is not a weakly prime, because it can be changed into another prime (6660511065073) 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, 3330255532736 + 3330255532737.

It is an arithmetic number, because the mean of its divisors is an integer number (3330255532737).

Almost surely, 2^{6660511065473} is an apocalyptic number.

It is an amenable number.

6660511065473 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660511065473 is an equidigital number, since it uses as much as digits as its factorization.

6660511065473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 6660511065473 in words is "six trillion, six hundred sixty billion, five hundred eleven million, sixty-five thousand, four hundred seventy-three".