1668387240167 has 2 divisors, whose sum is σ = 1668387240168. Its totient is φ = 1668387240166.

The previous prime is 1668387240131. The next prime is 1668387240173. The reversal of 1668387240167 is 7610427838661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668387240167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668387240197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834193620083 + 834193620084.

It is an arithmetic number, because the mean of its divisors is an integer number (834193620084).

Almost surely, 2^{1668387240167} is an apocalyptic number.

1668387240167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668387240167 is an equidigital number, since it uses as much as digits as its factorization.

1668387240167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 1668387240167 in words is "one trillion, six hundred sixty-eight billion, three hundred eighty-seven million, two hundred forty thousand, one hundred sixty-seven".