166663198 has 16 divisors (see below), whose sum is σ = 280931616. Its totient is φ = 73576800.

The previous prime is 166663181. The next prime is 166663213. The reversal of 166663198 is 891366661.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138753 + ... + 139948.

It is an arithmetic number, because the mean of its divisors is an integer number (17558226).

Almost surely, 2^166663198 is an apocalyptic number.

166663198 is a deficient number, since it is larger than the sum of its proper divisors (114268418).

166663198 is a wasteful number, since it uses less digits than its factorization.

166663198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278739.

The product of its digits is 279936, while the sum is 46.

The square root of 166663198 is about 12909.8101457767. The cubic root of 166663198 is about 550.3173903610.

The spelling of 166663198 in words is "one hundred sixty-six million, six hundred sixty-three thousand, one hundred ninety-eight".