166522205 has 18 divisors (see below), whose sum is σ = 208000026. Its totient is φ = 127977696.

The previous prime is 166522199. The next prime is 166522219. The reversal of 166522205 is 502225661.

It can be written as a sum of positive squares in 3 ways, for example, as 19166884 + 147355321 = 4378^2 + 12139^2 .

It is not a de Polignac number, because 166522205 - 2⁴ = 166522189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 836696 + ... + 836894.

It is an arithmetic number, because the mean of its divisors is an integer number (11555557).

Almost surely, 2^166522205 is an apocalyptic number.

It is an amenable number.

166522205 is a deficient number, since it is larger than the sum of its proper divisors (41477821).

166522205 is an frugal number, since it uses more digits than its factorization.

166522205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 166522205 is about 12904.3482981513. The cubic root of 166522205 is about 550.1621615501.

Adding to 166522205 its reverse (502225661), we get a palindrome (668747866).

The spelling of 166522205 in words is "one hundred sixty-six million, five hundred twenty-two thousand, two hundred five".