1666692747103 has 2 divisors, whose sum is σ = 1666692747104. Its totient is φ = 1666692747102.

The previous prime is 1666692747089. The next prime is 1666692747113. The reversal of 1666692747103 is 3017472966661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666692747103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666692747113) 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, 833346373551 + 833346373552.

It is an arithmetic number, because the mean of its divisors is an integer number (833346373552).

Almost surely, 2^{1666692747103} is an apocalyptic number.

1666692747103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666692747103 is an equidigital number, since it uses as much as digits as its factorization.

1666692747103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 1666692747103 in words is "one trillion, six hundred sixty-six billion, six hundred ninety-two million, seven hundred forty-seven thousand, one hundred three".