166444103211 has 8 divisors (see below), whose sum is σ = 222438002640. Its totient is φ = 110706469632.

The previous prime is 166444103209. The next prime is 166444103219. The reversal of 166444103211 is 112301444661.

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

It is not a de Polignac number, because 166444103211 - 2¹ = 166444103209 is a prime.

It is a super-3 number, since 3×166444103211³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166444103219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64064946 + ... + 64067543.

It is an arithmetic number, because the mean of its divisors is an integer number (27804750330).

Almost surely, 2^166444103211 is an apocalyptic number.

166444103211 is a deficient number, since it is larger than the sum of its proper divisors (55993899429).

166444103211 is a wasteful number, since it uses less digits than its factorization.

166444103211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128132925.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 166444103211 its reverse (112301444661), we get a palindrome (278745547872).

The spelling of 166444103211 in words is "one hundred sixty-six billion, four hundred forty-four million, one hundred three thousand, two hundred eleven".