664082788093 has 4 divisors (see below), whose sum is σ = 680279929308. Its totient is φ = 647885646880.

The previous prime is 664082788069. The next prime is 664082788111. The reversal of 664082788093 is 390887280466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249278521284 + 414804266809 = 499278^2 + 644053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664082788093 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 (664082788393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8098570546 + ... + 8098570627.

It is an arithmetic number, because the mean of its divisors is an integer number (170069982327).

Almost surely, 2^664082788093 is an apocalyptic number.

It is an amenable number.

664082788093 is a deficient number, since it is larger than the sum of its proper divisors (16197141215).

664082788093 is a wasteful number, since it uses less digits than its factorization.

664082788093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16197141214.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 664082788093 in words is "six hundred sixty-four billion, eighty-two million, seven hundred eighty-eight thousand, ninety-three".