118195866 has 48 divisors (see below), whose sum is σ = 277798248. Its totient is φ = 36172800.

The previous prime is 118195859. The next prime is 118195877. The reversal of 118195866 is 668591811.

It can be written as a sum of positive squares in 4 ways, for example, as 78694641 + 39501225 = 8871^2 + 6285^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7836 + ... + 17256.

Almost surely, 2^118195866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118195866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138899124).

118195866 is an abundant number, since it is smaller than the sum of its proper divisors (159602382).

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

118195866 is a wasteful number, since it uses less digits than its factorization.

118195866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487 (or 9484 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 118195866 is about 10871.7922165575. The cubic root of 118195866 is about 490.7580464415.

The spelling of 118195866 in words is "one hundred eighteen million, one hundred ninety-five thousand, eight hundred sixty-six".