166267289 has 2 divisors, whose sum is σ = 166267290. Its totient is φ = 166267288.

The previous prime is 166267249. The next prime is 166267319. The reversal of 166267289 is 982762661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121176064 + 45091225 = 11008^2 + 6715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166267289 is a prime.

It is a super-2 number, since 2×166267289² = 55289622782819042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166267249) 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 as a sum of consecutive naturals, namely, 83133644 + 83133645.

It is an arithmetic number, because the mean of its divisors is an integer number (83133645).

Almost surely, 2^166267289 is an apocalyptic number.

It is an amenable number.

166267289 is a deficient number, since it is larger than the sum of its proper divisors (1).

166267289 is an equidigital number, since it uses as much as digits as its factorization.

166267289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 166267289 is about 12894.4673794616. The cubic root of 166267289 is about 549.8812845704.

The spelling of 166267289 in words is "one hundred sixty-six million, two hundred sixty-seven thousand, two hundred eighty-nine".