166566353 has 4 divisors (see below), whose sum is σ = 166656420. Its totient is φ = 166476288.

The previous prime is 166566319. The next prime is 166566359. The reversal of 166566353 is 353665661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92313664 + 74252689 = 9608^2 + 8617^2 .

It is a cyclic number.

It is not a de Polignac number, because 166566353 - 2¹⁸ = 166304209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166566353.

It is not an unprimeable number, because it can be changed into a prime (166566359) 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, 42200 + ... + 45977.

It is an arithmetic number, because the mean of its divisors is an integer number (41664105).

Almost surely, 2^166566353 is an apocalyptic number.

It is an amenable number.

166566353 is a deficient number, since it is larger than the sum of its proper divisors (90067).

166566353 is an equidigital number, since it uses as much as digits as its factorization.

166566353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90066.

The product of its digits is 291600, while the sum is 41.

The square root of 166566353 is about 12906.0587709804. The cubic root of 166566353 is about 550.2107765141.

The spelling of 166566353 in words is "one hundred sixty-six million, five hundred sixty-six thousand, three hundred fifty-three".