8172166 has 16 divisors (see below), whose sum is σ = 13028400. Its totient is φ = 3833568.

The previous prime is 8172139. The next prime is 8172167. The reversal of 8172166 is 6612718.

8172166 = 218² + 219² + ... + 326².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172167) 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, 3156 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (814275).

Almost surely, 2^8172166 is an apocalyptic number.

8172166 is a deficient number, since it is larger than the sum of its proper divisors (4856234).

8172166 is a wasteful number, since it uses less digits than its factorization.

8172166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103.

The product of its digits is 4032, while the sum is 31.

The square root of 8172166 is about 2858.7000542204. The cubic root of 8172166 is about 201.4245459206.

It can be divided in two parts, 8172 and 166, that added together give a palindrome (8338).

The spelling of 8172166 in words is "eight million, one hundred seventy-two thousand, one hundred sixty-six".