197986166 has 48 divisors (see below), whose sum is σ = 354585600. Its totient is φ = 82646928.

The previous prime is 197986163. The next prime is 197986193. The reversal of 197986166 is 661689791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197986163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828275 + ... + 828513.

It is an arithmetic number, because the mean of its divisors is an integer number (7387200).

Almost surely, 2^197986166 is an apocalyptic number.

197986166 is a deficient number, since it is larger than the sum of its proper divisors (156599434).

197986166 is a wasteful number, since it uses less digits than its factorization.

197986166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 434 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 197986166 is about 14070.7557010986. The cubic root of 197986166 is about 582.8340937419.

The spelling of 197986166 in words is "one hundred ninety-seven million, nine hundred eighty-six thousand, one hundred sixty-six".