664838484343 has 32 divisors (see below), whose sum is σ = 760597770240. Its totient is φ = 575844927840.

The previous prime is 664838484263. The next prime is 664838484347. The reversal of 664838484343 is 343484838466.

It is a cyclic number.

It is not a de Polignac number, because 664838484343 - 2²⁵ = 664804929911 is a prime.

It is a super-2 number, since 2×664838484343² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664838484347) 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 31 ways as a sum of consecutive naturals, for example, 2994280 + ... + 3208642.

It is an arithmetic number, because the mean of its divisors is an integer number (23768680320).

Almost surely, 2^664838484343 is an apocalyptic number.

664838484343 is a deficient number, since it is larger than the sum of its proper divisors (95759285897).

664838484343 is a wasteful number, since it uses less digits than its factorization.

664838484343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214579.

The product of its digits is 127401984, while the sum is 61.

The spelling of 664838484343 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, four hundred eighty-four thousand, three hundred forty-three".