166033313 has 4 divisors (see below), whose sum is σ = 170082948. Its totient is φ = 161983680.

The previous prime is 166033279. The next prime is 166033321. The reversal of 166033313 is 313330661.

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 54878464 + 111154849 = 7408^2 + 10543^2 .

It is a cyclic number.

It is not a de Polignac number, because 166033313 - 2²² = 161839009 is a prime.

It is a super-2 number, since 2×166033313² = 55134122051511938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166033513) 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, 2024756 + ... + 2024837.

It is an arithmetic number, because the mean of its divisors is an integer number (42520737).

Almost surely, 2^166033313 is an apocalyptic number.

It is an amenable number.

166033313 is a deficient number, since it is larger than the sum of its proper divisors (4049635).

166033313 is an equidigital number, since it uses as much as digits as its factorization.

166033313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049634.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 166033313 is about 12885.3914569950. The cubic root of 166033313 is about 549.6232273536.

Adding to 166033313 its reverse (313330661), we get a palindrome (479363974).

The spelling of 166033313 in words is "one hundred sixty-six million, thirty-three thousand, three hundred thirteen".