664416245524727 has 2 divisors, whose sum is σ = 664416245524728. Its totient is φ = 664416245524726.

The previous prime is 664416245524589. The next prime is 664416245524783. The reversal of 664416245524727 is 727425542614466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664416245524727 - 2¹⁰ = 664416245523703 is a prime.

It is a super-2 number, since 2×664416245524727² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664416245521727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332208122762363 + 332208122762364.

It is an arithmetic number, because the mean of its divisors is an integer number (332208122762364).

Almost surely, 2^{664416245524727} is an apocalyptic number.

664416245524727 is a deficient number, since it is larger than the sum of its proper divisors (1).

664416245524727 is an equidigital number, since it uses as much as digits as its factorization.

664416245524727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 541900800, while the sum is 65.

The spelling of 664416245524727 in words is "six hundred sixty-four trillion, four hundred sixteen billion, two hundred forty-five million, five hundred twenty-four thousand, seven hundred twenty-seven".