181668998 has 8 divisors (see below), whose sum is σ = 311432592. Its totient is φ = 77858136.

The previous prime is 181668997. The next prime is 181669009. The reversal of 181668998 is 899866181.

181668998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181668997) by changing a digit.

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, 6488165 + ... + 6488192.

It is an arithmetic number, because the mean of its divisors is an integer number (38929074).

Almost surely, 2^181668998 is an apocalyptic number.

181668998 is a deficient number, since it is larger than the sum of its proper divisors (129763594).

181668998 is a wasteful number, since it uses less digits than its factorization.

181668998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12976366.

The product of its digits is 1492992, while the sum is 56.

The square root of 181668998 is about 13478.4642300226. The cubic root of 181668998 is about 566.3613482507.

The spelling of 181668998 in words is "one hundred eighty-one million, six hundred sixty-eight thousand, nine hundred ninety-eight".