166319213 has 2 divisors, whose sum is σ = 166319214. Its totient is φ = 166319212.

The previous prime is 166319201. The next prime is 166319221. The reversal of 166319213 is 312913661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 79959364 = 9293^2 + 8942^2 .

It is a cyclic number.

It is not a de Polignac number, because 166319213 - 2¹⁰ = 166318189 is a prime.

It is a super-2 number, since 2×166319213² = 55324161225878738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166319213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166319113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83159606 + 83159607.

It is an arithmetic number, because the mean of its divisors is an integer number (83159607).

Almost surely, 2^166319213 is an apocalyptic number.

It is an amenable number.

166319213 is a deficient number, since it is larger than the sum of its proper divisors (1).

166319213 is an equidigital number, since it uses as much as digits as its factorization.

166319213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 166319213 is about 12896.4806439586. The cubic root of 166319213 is about 549.9385198496.

The spelling of 166319213 in words is "one hundred sixty-six million, three hundred nineteen thousand, two hundred thirteen".