172108566 has 48 divisors (see below), whose sum is σ = 427778208. Its totient is φ = 48988800.

The previous prime is 172108553. The next prime is 172108583. The reversal of 172108566 is 665801271.

It is a self number, because there is not a number n which added to its sum of digits gives 172108566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32976 + ... + 37836.

It is an arithmetic number, because the mean of its divisors is an integer number (8912046).

Almost surely, 2^172108566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172108566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213889104).

172108566 is an abundant number, since it is smaller than the sum of its proper divisors (255669642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172108566 is a wasteful number, since it uses less digits than its factorization.

172108566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5154 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 172108566 is about 13119.0154356186. The cubic root of 172108566 is about 556.2467613160.

The spelling of 172108566 in words is "one hundred seventy-two million, one hundred eight thousand, five hundred sixty-six".