664614108325 has 12 divisors (see below), whose sum is σ = 824632469028. Its totient is φ = 531361625600.

The previous prime is 664614108307. The next prime is 664614108421. The reversal of 664614108325 is 523801416466.

It can be written as a sum of positive squares in 6 ways, for example, as 45784872676 + 618829235649 = 213974^2 + 786657^2 .

It is not a de Polignac number, because 664614108325 - 2⁵ = 664614108293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8200396 + ... + 8281045.

It is an arithmetic number, because the mean of its divisors is an integer number (68719372419).

Almost surely, 2^664614108325 is an apocalyptic number.

It is an amenable number.

664614108325 is a deficient number, since it is larger than the sum of its proper divisors (160018360703).

664614108325 is a wasteful number, since it uses less digits than its factorization.

664614108325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16483064 (or 16483059 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 664614108325 in words is "six hundred sixty-four billion, six hundred fourteen million, one hundred eight thousand, three hundred twenty-five".