199742166 has 128 divisors (see below), whose sum is σ = 508032000. Its totient is φ = 57708288.

The previous prime is 199742159. The next prime is 199742177. The reversal of 199742166 is 661247991.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1436925 + ... + 1437063.

It is an arithmetic number, because the mean of its divisors is an integer number (3969000).

Almost surely, 2^199742166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199742166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254016000).

199742166 is an abundant number, since it is smaller than the sum of its proper divisors (308289834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199742166 is a wasteful number, since it uses less digits than its factorization.

199742166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 199742166 is about 14133.0168753879. The cubic root of 199742166 is about 584.5521358442.

The spelling of 199742166 in words is "one hundred ninety-nine million, seven hundred forty-two thousand, one hundred sixty-six".