197666119 has 4 divisors (see below), whose sum is σ = 225904144. Its totient is φ = 169428096.

The previous prime is 197666111. The next prime is 197666219. The reversal of 197666119 is 911666791.

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

It is a cyclic number.

It is not a de Polignac number, because 197666119 - 2³ = 197666111 is a prime.

It is a super-2 number, since 2×197666119² = 78143789201044322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197666111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14119002 + ... + 14119015.

It is an arithmetic number, because the mean of its divisors is an integer number (56476036).

Almost surely, 2^197666119 is an apocalyptic number.

197666119 is a deficient number, since it is larger than the sum of its proper divisors (28238025).

197666119 is an equidigital number, since it uses as much as digits as its factorization.

197666119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28238024.

The product of its digits is 122472, while the sum is 46.

The square root of 197666119 is about 14059.3783290727. The cubic root of 197666119 is about 582.5198716105.

The spelling of 197666119 in words is "one hundred ninety-seven million, six hundred sixty-six thousand, one hundred nineteen".