166550221331210 has 16 divisors (see below), whose sum is σ = 299791859097600. Its totient is φ = 66619763932176.

The previous prime is 166550221331189. The next prime is 166550221331257. The reversal of 166550221331210 is 12133122055661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38414570 + ... + 42529749.

It is an arithmetic number, because the mean of its divisors is an integer number (18736991193600).

Almost surely, 2^{166550221331210} is an apocalyptic number.

166550221331210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166550221331210 is a deficient number, since it is larger than the sum of its proper divisors (133241637766390).

166550221331210 is a wasteful number, since it uses less digits than its factorization.

166550221331210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81150085.

The product of its (nonzero) digits is 64800, while the sum is 38.

Adding to 166550221331210 its reverse (12133122055661), we get a palindrome (178683343386871).

The spelling of 166550221331210 in words is "one hundred sixty-six trillion, five hundred fifty billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred ten".