197166866 has 8 divisors (see below), whose sum is σ = 318500364. Its totient is φ = 91000080.

The previous prime is 197166841. The next prime is 197166877. The reversal of 197166866 is 668661791.

It can be written as a sum of positive squares in 2 ways, for example, as 196812841 + 354025 = 14029^2 + 595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3791645 + ... + 3791696.

Almost surely, 2^197166866 is an apocalyptic number.

197166866 is a deficient number, since it is larger than the sum of its proper divisors (121333498).

197166866 is a wasteful number, since it uses less digits than its factorization.

197166866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7583356.

The product of its digits is 653184, while the sum is 50.

The square root of 197166866 is about 14041.6119445027. The cubic root of 197166866 is about 582.0290271025.

The spelling of 197166866 in words is "one hundred ninety-seven million, one hundred sixty-six thousand, eight hundred sixty-six".