166044469 has 2 divisors, whose sum is σ = 166044470. Its totient is φ = 166044468.

The previous prime is 166044451. The next prime is 166044497. The reversal of 166044469 is 964440661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103428900 + 62615569 = 10170^2 + 7913^2 .

It is a cyclic number.

It is not a de Polignac number, because 166044469 - 2⁷ = 166044341 is a prime.

It is a super-2 number, since 2×166044469² = 55141531370983922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166044449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83022234 + 83022235.

It is an arithmetic number, because the mean of its divisors is an integer number (83022235).

Almost surely, 2^166044469 is an apocalyptic number.

It is an amenable number.

166044469 is a deficient number, since it is larger than the sum of its proper divisors (1).

166044469 is an equidigital number, since it uses as much as digits as its factorization.

166044469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 166044469 is about 12885.8243430523. The cubic root of 166044469 is about 549.6355370508.

The spelling of 166044469 in words is "one hundred sixty-six million, forty-four thousand, four hundred sixty-nine".