664224013543 has 2 divisors, whose sum is σ = 664224013544. Its totient is φ = 664224013542.

The previous prime is 664224013529. The next prime is 664224013589. The reversal of 664224013543 is 345310422466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664224013543 - 2³³ = 655634078951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664224013496 and 664224013505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664224014543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332112006771 + 332112006772.

It is an arithmetic number, because the mean of its divisors is an integer number (332112006772).

Almost surely, 2^664224013543 is an apocalyptic number.

664224013543 is a deficient number, since it is larger than the sum of its proper divisors (1).

664224013543 is an equidigital number, since it uses as much as digits as its factorization.

664224013543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 664224013543 in words is "six hundred sixty-four billion, two hundred twenty-four million, thirteen thousand, five hundred forty-three".