1666430113 has 2 divisors, whose sum is σ = 1666430114. Its totient is φ = 1666430112.

The previous prime is 1666430071. The next prime is 1666430153. The reversal of 1666430113 is 3110346661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1621914529 + 44515584 = 40273^2 + 6672^2 .

It is an emirp because it is prime and its reverse (3110346661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666430113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666430153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833215056 + 833215057.

It is an arithmetic number, because the mean of its divisors is an integer number (833215057).

Almost surely, 2^1666430113 is an apocalyptic number.

It is an amenable number.

1666430113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666430113 is an equidigital number, since it uses as much as digits as its factorization.

1666430113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1666430113 is about 40821.9317646777. The cubic root of 1666430113 is about 1185.5750057658.

Adding to 1666430113 its reverse (3110346661), we get a palindrome (4776776774).

The spelling of 1666430113 in words is "one billion, six hundred sixty-six million, four hundred thirty thousand, one hundred thirteen".