664143613 has 12 divisors (see below), whose sum is σ = 801075360. Its totient is φ = 539302536.

The previous prime is 664143563. The next prime is 664143629. The reversal of 664143613 is 316341466.

It is not a de Polignac number, because 664143613 - 2²¹ = 662046461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664143113) 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 11 ways as a sum of consecutive naturals, for example, 128883 + ... + 133936.

It is an arithmetic number, because the mean of its divisors is an integer number (66756280).

Almost surely, 2^664143613 is an apocalyptic number.

It is an amenable number.

664143613 is a deficient number, since it is larger than the sum of its proper divisors (136931747).

664143613 is a wasteful number, since it uses less digits than its factorization.

664143613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262864 (or 262845 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 664143613 is about 25770.9839354263. The cubic root of 664143613 is about 872.4770263489.

The spelling of 664143613 in words is "six hundred sixty-four million, one hundred forty-three thousand, six hundred thirteen".