198471166697 has 4 divisors (see below), whose sum is σ = 199803188100. Its totient is φ = 197139145296.

The previous prime is 198471166681. The next prime is 198471166709. The reversal of 198471166697 is 796661174891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27760891456 + 170710275241 = 166616^2 + 413171^2 .

It is a cyclic number.

It is not a de Polignac number, because 198471166697 - 2⁴ = 198471166681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198471166627) 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, 666010478 + ... + 666010775.

It is an arithmetic number, because the mean of its divisors is an integer number (49950797025).

Almost surely, 2^198471166697 is an apocalyptic number.

It is an amenable number.

198471166697 is a deficient number, since it is larger than the sum of its proper divisors (1332021403).

198471166697 is a wasteful number, since it uses less digits than its factorization.

198471166697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332021402.

The product of its digits is 27433728, while the sum is 65.

The spelling of 198471166697 in words is "one hundred ninety-eight billion, four hundred seventy-one million, one hundred sixty-six thousand, six hundred ninety-seven".