166046213 has 4 divisors (see below), whose sum is σ = 166247340. Its totient is φ = 165845088.

The previous prime is 166046201. The next prime is 166046227. The reversal of 166046213 is 312640661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312640661 = 11257 ⋅27773.

It can be written as a sum of positive squares in 2 ways, for example, as 115820644 + 50225569 = 10762^2 + 7087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166046213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166046233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99320 + ... + 100977.

It is an arithmetic number, because the mean of its divisors is an integer number (41561835).

Almost surely, 2^166046213 is an apocalyptic number.

It is an amenable number.

166046213 is a deficient number, since it is larger than the sum of its proper divisors (201127).

166046213 is an equidigital number, since it uses as much as digits as its factorization.

166046213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201126.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 166046213 is about 12885.8920141370. The cubic root of 166046213 is about 549.6374613566.

Adding to 166046213 its reverse (312640661), we get a palindrome (478686874).

The spelling of 166046213 in words is "one hundred sixty-six million, forty-six thousand, two hundred thirteen".