664817682155 has 8 divisors (see below), whose sum is σ = 870306783984. Its totient is φ = 483503768800.

The previous prime is 664817682091. The next prime is 664817682167. The reversal of 664817682155 is 551286718466.

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

It is not a de Polignac number, because 664817682155 - 2⁶ = 664817682091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664817682094 and 664817682103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6043797056 + ... + 6043797165.

It is an arithmetic number, because the mean of its divisors is an integer number (108788347998).

Almost surely, 2^664817682155 is an apocalyptic number.

664817682155 is a deficient number, since it is larger than the sum of its proper divisors (205489101829).

664817682155 is a wasteful number, since it uses less digits than its factorization.

664817682155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12087594237.

The product of its digits is 19353600, while the sum is 59.

The spelling of 664817682155 in words is "six hundred sixty-four billion, eight hundred seventeen million, six hundred eighty-two thousand, one hundred fifty-five".