66664259603 has 2 divisors, whose sum is σ = 66664259604. Its totient is φ = 66664259602.

The previous prime is 66664259537. The next prime is 66664259609. The reversal of 66664259603 is 30695246666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66664259603 - 2¹⁰ = 66664258579 is a prime.

It is not a weakly prime, because it can be changed into another prime (66664259609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33332129801 + 33332129802.

It is an arithmetic number, because the mean of its divisors is an integer number (33332129802).

Almost surely, 2^66664259603 is an apocalyptic number.

66664259603 is a deficient number, since it is larger than the sum of its proper divisors (1).

66664259603 is an equidigital number, since it uses as much as digits as its factorization.

66664259603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 66664259603 in words is "sixty-six billion, six hundred sixty-four million, two hundred fifty-nine thousand, six hundred three".