664581546683 has 2 divisors, whose sum is σ = 664581546684. Its totient is φ = 664581546682.

The previous prime is 664581546659. The next prime is 664581546691. The reversal of 664581546683 is 386645185466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664581546683 - 2³⁰ = 663507804859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (664581546383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332290773341 + 332290773342.

It is an arithmetic number, because the mean of its divisors is an integer number (332290773342).

Almost surely, 2^664581546683 is an apocalyptic number.

664581546683 is a deficient number, since it is larger than the sum of its proper divisors (1).

664581546683 is an equidigital number, since it uses as much as digits as its factorization.

664581546683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99532800, while the sum is 62.

The spelling of 664581546683 in words is "six hundred sixty-four billion, five hundred eighty-one million, five hundred forty-six thousand, six hundred eighty-three".