166811103 has 32 divisors (see below), whose sum is σ = 257414400. Its totient is φ = 106632288.

The previous prime is 166811041. The next prime is 166811119. The reversal of 166811103 is 301118661.

It is not a de Polignac number, because 166811103 - 2¹⁰ = 166810079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166811143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126976 + ... + 128282.

It is an arithmetic number, because the mean of its divisors is an integer number (8044200).

Almost surely, 2^166811103 is an apocalyptic number.

166811103 is a deficient number, since it is larger than the sum of its proper divisors (90603297).

166811103 is a wasteful number, since it uses less digits than its factorization.

166811103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 166811103 is about 12915.5372710546. The cubic root of 166811103 is about 550.4801350032.

Adding to 166811103 its reverse (301118661), we get a palindrome (467929764).

The spelling of 166811103 in words is "one hundred sixty-six million, eight hundred eleven thousand, one hundred three".