1668479201 has 2 divisors, whose sum is σ = 1668479202. Its totient is φ = 1668479200.

The previous prime is 1668479149. The next prime is 1668479233. The reversal of 1668479201 is 1029748661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391290000 + 277189201 = 37300^2 + 16649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668479201 - 2¹⁰ = 1668478177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668479251) 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, 834239600 + 834239601.

It is an arithmetic number, because the mean of its divisors is an integer number (834239601).

Almost surely, 2^1668479201 is an apocalyptic number.

It is an amenable number.

1668479201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668479201 is an equidigital number, since it uses as much as digits as its factorization.

1668479201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1668479201 is about 40847.0219355096. The cubic root of 1668479201 is about 1186.0607452011.

The spelling of 1668479201 in words is "one billion, six hundred sixty-eight million, four hundred seventy-nine thousand, two hundred one".