1668159347 has 2 divisors, whose sum is σ = 1668159348. Its totient is φ = 1668159346.

The previous prime is 1668159299. The next prime is 1668159377. The reversal of 1668159347 is 7439518661.

1668159347 is nontrivially palindromic in base 14.

It is a strong prime.

It is an emirp because it is prime and its reverse (7439518661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1668159347 - 2¹⁴ = 1668142963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668159295 and 1668159304.

It is not a weakly prime, because it can be changed into another prime (1668159377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834079673 + 834079674.

It is an arithmetic number, because the mean of its divisors is an integer number (834079674).

Almost surely, 2^1668159347 is an apocalyptic number.

1668159347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668159347 is an equidigital number, since it uses as much as digits as its factorization.

1668159347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 1668159347 is about 40843.1064807759. The cubic root of 1668159347 is about 1185.9849495269.

The spelling of 1668159347 in words is "one billion, six hundred sixty-eight million, one hundred fifty-nine thousand, three hundred forty-seven".