664466442349 has 2 divisors, whose sum is σ = 664466442350. Its totient is φ = 664466442348.

The previous prime is 664466442331. The next prime is 664466442359. The reversal of 664466442349 is 943244664466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383891768100 + 280574674249 = 619590^2 + 529693^2 .

It is a cyclic number.

It is not a de Polignac number, because 664466442349 - 2³⁵ = 630106703981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664466442293 and 664466442302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664466442359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332233221174 + 332233221175.

It is an arithmetic number, because the mean of its divisors is an integer number (332233221175).

Almost surely, 2^664466442349 is an apocalyptic number.

It is an amenable number.

664466442349 is a deficient number, since it is larger than the sum of its proper divisors (1).

664466442349 is an equidigital number, since it uses as much as digits as its factorization.

664466442349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71663616, while the sum is 58.

The spelling of 664466442349 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, three hundred forty-nine".