1666683333563 has 2 divisors, whose sum is σ = 1666683333564. Its totient is φ = 1666683333562.

The previous prime is 1666683333551. The next prime is 1666683333577. The reversal of 1666683333563 is 3653333866661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666683333563 - 2⁸ = 1666683333307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666683333163) 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, 833341666781 + 833341666782.

It is an arithmetic number, because the mean of its divisors is an integer number (833341666782).

Almost surely, 2^{1666683333563} is an apocalyptic number.

1666683333563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666683333563 is an equidigital number, since it uses as much as digits as its factorization.

1666683333563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75582720, while the sum is 59.

The spelling of 1666683333563 in words is "one trillion, six hundred sixty-six billion, six hundred eighty-three million, three hundred thirty-three thousand, five hundred sixty-three".