166226523 has 4 divisors (see below), whose sum is σ = 221635368. Its totient is φ = 110817680.

The previous prime is 166226513. The next prime is 166226537. The reversal of 166226523 is 325622661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166226523 - 2¹³ = 166218331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166226513) 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, 27704418 + ... + 27704423.

It is an arithmetic number, because the mean of its divisors is an integer number (55408842).

Almost surely, 2^166226523 is an apocalyptic number.

166226523 is a deficient number, since it is larger than the sum of its proper divisors (55408845).

166226523 is an equidigital number, since it uses as much as digits as its factorization.

166226523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55408844.

The product of its digits is 25920, while the sum is 33.

The square root of 166226523 is about 12892.8865270738. The cubic root of 166226523 is about 549.8363402865.

The spelling of 166226523 in words is "one hundred sixty-six million, two hundred twenty-six thousand, five hundred twenty-three".