664577731213173 has 12 divisors (see below), whose sum is σ = 960048621382240. Its totient is φ = 443004277902696.

The previous prime is 664577731213163. The next prime is 664577731213217. The reversal of 664577731213173 is 371312137775466.

664577731213173 is a `hidden beast` number, since 6 + 6 + 4 + 57 + 77 + 312 + 131 + 73 = 666.

It is not a de Polignac number, because 664577731213173 - 2¹⁴ = 664577731196789 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 664577731213173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664577731213163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3961820311 + ... + 3961988052.

Almost surely, 2^{664577731213173} is an apocalyptic number.

It is an amenable number.

664577731213173 is a deficient number, since it is larger than the sum of its proper divisors (295470890169067).

664577731213173 is a wasteful number, since it uses less digits than its factorization.

664577731213173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7923817688 (or 7923817685 counting only the distinct ones).

The product of its digits is 93350880, while the sum is 63.

The spelling of 664577731213173 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, seven hundred thirty-one million, two hundred thirteen thousand, one hundred seventy-three".