197668222866791 has 8 divisors (see below), whose sum is σ = 201597835875840. Its totient is φ = 193757919996088.

The previous prime is 197668222866769. The next prime is 197668222866797.

197668222866791 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197668222866791 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 (197668222866797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4827513911 + ... + 4827554856.

It is an arithmetic number, because the mean of its divisors is an integer number (25199729484480).

Almost surely, 2^{197668222866791} is an apocalyptic number.

197668222866791 is a deficient number, since it is larger than the sum of its proper divisors (3929613009049).

197668222866791 is an equidigital number, since it uses as much as digits as its factorization.

197668222866791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655069173.

The product of its digits is 2633637888, while the sum is 80.

The spelling of 197668222866791 in words is "one hundred ninety-seven trillion, six hundred sixty-eight billion, two hundred twenty-two million, eight hundred sixty-six thousand, seven hundred ninety-one".