668206113 has 8 divisors (see below), whose sum is σ = 891230976. Its totient is φ = 445326000.

The previous prime is 668206043. The next prime is 668206127. The reversal of 668206113 is 311602866.

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

It is a de Polignac number, because none of the positive numbers 2^k-668206113 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (668206013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24913 + ... + 44238.

It is an arithmetic number, because the mean of its divisors is an integer number (111403872).

Almost surely, 2^668206113 is an apocalyptic number.

It is an amenable number.

668206113 is a deficient number, since it is larger than the sum of its proper divisors (223024863).

668206113 is a wasteful number, since it uses less digits than its factorization.

668206113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72375.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 668206113 is about 25849.6830348072. The cubic root of 668206113 is about 874.2523629474.

Adding to 668206113 its reverse (311602866), we get a palindrome (979808979).

The spelling of 668206113 in words is "six hundred sixty-eight million, two hundred six thousand, one hundred thirteen".