664543754443 has 8 divisors (see below), whose sum is σ = 669454278480. Its totient is φ = 659634097920.

The previous prime is 664543754423. The next prime is 664543754471. The reversal of 664543754443 is 344457345466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664543754443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664543754423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1363203 + ... + 1785331.

It is an arithmetic number, because the mean of its divisors is an integer number (83681784810).

Almost surely, 2^664543754443 is an apocalyptic number.

664543754443 is a deficient number, since it is larger than the sum of its proper divisors (4910524037).

664543754443 is a wasteful number, since it uses less digits than its factorization.

664543754443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433757.

The product of its digits is 58060800, while the sum is 55.

The spelling of 664543754443 in words is "six hundred sixty-four billion, five hundred forty-three million, seven hundred fifty-four thousand, four hundred forty-three".