166244198 has 4 divisors (see below), whose sum is σ = 249366300. Its totient is φ = 83122098.

The previous prime is 166244191. The next prime is 166244209. The reversal of 166244198 is 891442661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891442661 = 421 ⋅2117441.

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 as a sum of consecutive naturals, namely, 41561048 + ... + 41561051.

It is an arithmetic number, because the mean of its divisors is an integer number (62341575).

Almost surely, 2^166244198 is an apocalyptic number.

166244198 is a deficient number, since it is larger than the sum of its proper divisors (83122102).

166244198 is an equidigital number, since it uses as much as digits as its factorization.

166244198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83122101.

The product of its digits is 82944, while the sum is 41.

The square root of 166244198 is about 12893.5719643550. The cubic root of 166244198 is about 549.8558277760.

The spelling of 166244198 in words is "one hundred sixty-six million, two hundred forty-four thousand, one hundred ninety-eight".