163601221166 has 8 divisors (see below), whose sum is σ = 251108851224. Its totient is φ = 79898270760.

The previous prime is 163601221141. The next prime is 163601221181. The reversal of 163601221166 is 661122106361.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951169805 + ... + 951169976.

It is an arithmetic number, because the mean of its divisors is an integer number (31388606403).

Almost surely, 2^163601221166 is an apocalyptic number.

163601221166 is a deficient number, since it is larger than the sum of its proper divisors (87507630058).

163601221166 is a wasteful number, since it uses less digits than its factorization.

163601221166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902339826.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 163601221166 in words is "one hundred sixty-three billion, six hundred one million, two hundred twenty-one thousand, one hundred sixty-six".