664429843 has 16 divisors (see below), whose sum is σ = 828944640. Its totient is φ = 517384800.

The previous prime is 664429841. The next prime is 664429859. The reversal of 664429843 is 348924466.

664429843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 664429843 - 2¹ = 664429841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664429793 and 664429802.

It is not an unprimeable number, because it can be changed into a prime (664429841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215533 + ... + 218593.

It is an arithmetic number, because the mean of its divisors is an integer number (51809040).

Almost surely, 2^664429843 is an apocalyptic number.

664429843 is a deficient number, since it is larger than the sum of its proper divisors (164514797).

664429843 is a wasteful number, since it uses less digits than its factorization.

664429843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898.

The product of its digits is 995328, while the sum is 46.

The square root of 664429843 is about 25776.5366758221. The cubic root of 664429843 is about 872.6023472520.

The spelling of 664429843 in words is "six hundred sixty-four million, four hundred twenty-nine thousand, eight hundred forty-three".