1668425008427 has 2 divisors, whose sum is σ = 1668425008428. Its totient is φ = 1668425008426.

The previous prime is 1668425008403. The next prime is 1668425008429. The reversal of 1668425008427 is 7248005248661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668425008427 - 2¹⁸ = 1668424746283 is a prime.

Together with 1668425008429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1668425008429) 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, 834212504213 + 834212504214.

It is an arithmetic number, because the mean of its divisors is an integer number (834212504214).

Almost surely, 2^{1668425008427} is an apocalyptic number.

1668425008427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668425008427 is an equidigital number, since it uses as much as digits as its factorization.

1668425008427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 1668425008427 in words is "one trillion, six hundred sixty-eight billion, four hundred twenty-five million, eight thousand, four hundred twenty-seven".