166563226 has 8 divisors (see below), whose sum is σ = 251522100. Its totient is φ = 82722528.

The previous prime is 166563223. The next prime is 166563239. The reversal of 166563226 is 622365661.

It can be written as a sum of positive squares in 2 ways, for example, as 115455025 + 51108201 = 10745^2 + 7149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166563223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279171 + ... + 279766.

Almost surely, 2^166563226 is an apocalyptic number.

166563226 is a deficient number, since it is larger than the sum of its proper divisors (84958874).

166563226 is a wasteful number, since it uses less digits than its factorization.

166563226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559088.

The product of its digits is 77760, while the sum is 37.

The square root of 166563226 is about 12905.9376257597. The cubic root of 166563226 is about 550.2073334020.

The spelling of 166563226 in words is "one hundred sixty-six million, five hundred sixty-three thousand, two hundred twenty-six".