1668686703527 has 2 divisors, whose sum is σ = 1668686703528. Its totient is φ = 1668686703526.

The previous prime is 1668686703361. The next prime is 1668686703539. The reversal of 1668686703527 is 7253076868661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668686703527 - 2³⁴ = 1651506834343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668686703587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834343351763 + 834343351764.

It is an arithmetic number, because the mean of its divisors is an integer number (834343351764).

Almost surely, 2^{1668686703527} is an apocalyptic number.

1668686703527 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668686703527 is an equidigital number, since it uses as much as digits as its factorization.

1668686703527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 1668686703527 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, five hundred twenty-seven".