1666384083229 has 2 divisors, whose sum is σ = 1666384083230. Its totient is φ = 1666384083228.

The previous prime is 1666384083191. The next prime is 1666384083233. The reversal of 1666384083229 is 9223804836661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1666384083225 + 4 = 1290885^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666384083229 - 2³¹ = 1664236599581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666384063229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833192041614 + 833192041615.

It is an arithmetic number, because the mean of its divisors is an integer number (833192041615).

Almost surely, 2^{1666384083229} is an apocalyptic number.

It is an amenable number.

1666384083229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666384083229 is an equidigital number, since it uses as much as digits as its factorization.

1666384083229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 1666384083229 in words is "one trillion, six hundred sixty-six billion, three hundred eighty-four million, eighty-three thousand, two hundred twenty-nine".