6663216197 has 4 divisors (see below), whose sum is σ = 7268963136. Its totient is φ = 6057469260.

The previous prime is 6663216193. The next prime is 6663216227. The reversal of 6663216197 is 7916123666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6663216197 - 2² = 6663216193 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 (6663216193) 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, 302873453 + ... + 302873474.

It is an arithmetic number, because the mean of its divisors is an integer number (1817240784).

Almost surely, 2^6663216197 is an apocalyptic number.

It is an amenable number.

6663216197 is a deficient number, since it is larger than the sum of its proper divisors (605746939).

6663216197 is a wasteful number, since it uses less digits than its factorization.

6663216197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605746938.

The product of its digits is 489888, while the sum is 47.

The square root of 6663216197 is about 81628.5256328938. The cubic root of 6663216197 is about 1881.7473001000.

The spelling of 6663216197 in words is "six billion, six hundred sixty-three million, two hundred sixteen thousand, one hundred ninety-seven".