166552205 has 4 divisors (see below), whose sum is σ = 199862652. Its totient is φ = 133241760.

The previous prime is 166552193. The next prime is 166552277. The reversal of 166552205 is 502255661.

166552205 = 7450² + 7451² + 7452².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502255661 = 683 ⋅735367.

It can be written as a sum of positive squares in 2 ways, for example, as 63712324 + 102839881 = 7982^2 + 10141^2 .

It is not a de Polignac number, because 166552205 - 2¹⁰ = 166551181 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 16655216 + ... + 16655225.

It is an arithmetic number, because the mean of its divisors is an integer number (49965663).

Almost surely, 2^166552205 is an apocalyptic number.

It is an amenable number.

166552205 is a deficient number, since it is larger than the sum of its proper divisors (33310447).

166552205 is an equidigital number, since it uses as much as digits as its factorization.

166552205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33310446.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 166552205 is about 12905.5106446820. The cubic root of 166552205 is about 550.1951979326.

The spelling of 166552205 in words is "one hundred sixty-six million, five hundred fifty-two thousand, two hundred five".