1668068651 has 2 divisors, whose sum is σ = 1668068652. Its totient is φ = 1668068650.

The previous prime is 1668068621. The next prime is 1668068683. The reversal of 1668068651 is 1568608661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668068651 - 2¹⁸ = 1667806507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668068596 and 1668068605.

It is not a weakly prime, because it can be changed into another prime (1668068621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834034325 + 834034326.

It is an arithmetic number, because the mean of its divisors is an integer number (834034326).

Almost surely, 2^1668068651 is an apocalyptic number.

1668068651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668068651 is an equidigital number, since it uses as much as digits as its factorization.

1668068651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 1668068651 is about 40841.9961681600. The cubic root of 1668068651 is about 1185.9634555689.

The spelling of 1668068651 in words is "one billion, six hundred sixty-eight million, sixty-eight thousand, six hundred fifty-one".