166244197 has 4 divisors (see below), whose sum is σ = 189993376. Its totient is φ = 142495020.

The previous prime is 166244191. The next prime is 166244209. The reversal of 166244197 is 791442661.

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 166244197 - 2²³ = 157855589 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 (166244191) 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, 11874579 + ... + 11874592.

It is an arithmetic number, because the mean of its divisors is an integer number (47498344).

Almost surely, 2^166244197 is an apocalyptic number.

It is an amenable number.

166244197 is a deficient number, since it is larger than the sum of its proper divisors (23749179).

166244197 is an equidigital number, since it uses as much as digits as its factorization.

166244197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23749178.

The product of its digits is 72576, while the sum is 40.

The square root of 166244197 is about 12893.5719255759. The cubic root of 166244197 is about 549.8558266735.

The spelling of 166244197 in words is "one hundred sixty-six million, two hundred forty-four thousand, one hundred ninety-seven".