664531083941 has 8 divisors (see below), whose sum is σ = 670854818040. Its totient is φ = 658211479488.

The previous prime is 664531083919. The next prime is 664531083947. The reversal of 664531083941 is 149380135466.

It can be written as a sum of positive squares in 4 ways, for example, as 1493822500 + 663037261441 = 38650^2 + 814271^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664531083941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664531083941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664531083947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708566 + ... + 1353191.

It is an arithmetic number, because the mean of its divisors is an integer number (83856852255).

Almost surely, 2^664531083941 is an apocalyptic number.

It is an amenable number.

664531083941 is a deficient number, since it is larger than the sum of its proper divisors (6323734099).

664531083941 is a wasteful number, since it uses less digits than its factorization.

664531083941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064823.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 664531083941 in words is "six hundred sixty-four billion, five hundred thirty-one million, eighty-three thousand, nine hundred forty-one".