664105443 has 8 divisors (see below), whose sum is σ = 891844800. Its totient is φ = 439551528.

The previous prime is 664105397. The next prime is 664105457. The reversal of 664105443 is 344501466.

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

It is not a de Polignac number, because 664105443 - 2¹⁷ = 663974371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664105483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795873 + ... + 796706.

It is an arithmetic number, because the mean of its divisors is an integer number (111480600).

Almost surely, 2^664105443 is an apocalyptic number.

664105443 is a deficient number, since it is larger than the sum of its proper divisors (227739357).

664105443 is a wasteful number, since it uses less digits than its factorization.

664105443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592721.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 664105443 is about 25770.2433632281. The cubic root of 664105443 is about 872.4603115473.

The spelling of 664105443 in words is "six hundred sixty-four million, one hundred five thousand, four hundred forty-three".