664331843 has 8 divisors (see below), whose sum is σ = 766754400. Its totient is φ = 563788800.

The previous prime is 664331821. The next prime is 664331861. The reversal of 664331843 is 348133466.

664331843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 664331843 - 2¹² = 664327747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664331797 and 664331806.

It is not an unprimeable number, because it can be changed into a prime (664331803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469118 + ... + 470531.

It is an arithmetic number, because the mean of its divisors is an integer number (95844300).

Almost surely, 2^664331843 is an apocalyptic number.

664331843 is a deficient number, since it is larger than the sum of its proper divisors (102422557).

664331843 is a wasteful number, since it uses less digits than its factorization.

664331843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939757.

The product of its digits is 124416, while the sum is 38.

The square root of 664331843 is about 25774.6356521290. The cubic root of 664331843 is about 872.5594436830.

The spelling of 664331843 in words is "six hundred sixty-four million, three hundred thirty-one thousand, eight hundred forty-three".