664085673758 has 64 divisors (see below), whose sum is σ = 1094894986752. Its totient is φ = 300231550080.

The previous prime is 664085673721. The next prime is 664085673793. The reversal of 664085673758 is 857376580466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 664085673694 and 664085673703.

It is a congruent number.

It is an unprimeable number.

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, 287357423 + ... + 287359733.

It is an arithmetic number, because the mean of its divisors is an integer number (17107734168).

Almost surely, 2^664085673758 is an apocalyptic number.

664085673758 is a deficient number, since it is larger than the sum of its proper divisors (430809312994).

664085673758 is a wasteful number, since it uses less digits than its factorization.

664085673758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249.

The product of its (nonzero) digits is 203212800, while the sum is 65.

The spelling of 664085673758 in words is "six hundred sixty-four billion, eighty-five million, six hundred seventy-three thousand, seven hundred fifty-eight".