1001668508429 has 2 divisors, whose sum is σ = 1001668508430. Its totient is φ = 1001668508428.

The previous prime is 1001668508419. The next prime is 1001668508447. The reversal of 1001668508429 is 9248058661001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997351755625 + 4316752804 = 998675^2 + 65702^2 .

It is an emirp because it is prime and its reverse (9248058661001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001668508429 - 2²⁰ = 1001667459853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001668508419) 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, 500834254214 + 500834254215.

It is an arithmetic number, because the mean of its divisors is an integer number (500834254215).

Almost surely, 2^{1001668508429} is an apocalyptic number.

It is an amenable number.

1001668508429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001668508429 is an equidigital number, since it uses as much as digits as its factorization.

1001668508429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 1001668508429 in words is "one trillion, one billion, six hundred sixty-eight million, five hundred eight thousand, four hundred twenty-nine".