664583626765 has 8 divisors (see below), whose sum is σ = 825000364440. Its totient is φ = 513333559872.

The previous prime is 664583626727. The next prime is 664583626843. The reversal of 664583626765 is 567626385466.

It can be written as a sum of positive squares in 4 ways, for example, as 115734564 + 664467892201 = 10758^2 + 815149^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 664583626765 - 2¹¹ = 664583624717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664583626697 and 664583626706.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2291667534 + ... + 2291667823.

It is an arithmetic number, because the mean of its divisors is an integer number (103125045555).

Almost surely, 2^664583626765 is an apocalyptic number.

It is an amenable number.

664583626765 is a deficient number, since it is larger than the sum of its proper divisors (160416737675).

664583626765 is a wasteful number, since it uses less digits than its factorization.

664583626765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583335391.

The product of its digits is 261273600, while the sum is 64.

The spelling of 664583626765 in words is "six hundred sixty-four billion, five hundred eighty-three million, six hundred twenty-six thousand, seven hundred sixty-five".