4066669 has 2 divisors, whose sum is σ = 4066670. Its totient is φ = 4066668.

The previous prime is 4066661. The next prime is 4066679. The reversal of 4066669 is 9666604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4040100 + 26569 = 2010^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 4066669 - 2³ = 4066661 is a prime.

It is a super-2 number, since 2×4066669² = 33075593511122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4066661) 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, 2033334 + 2033335.

It is an arithmetic number, because the mean of its divisors is an integer number (2033335).

Almost surely, 2^4066669 is an apocalyptic number.

It is an amenable number.

4066669 is a deficient number, since it is larger than the sum of its proper divisors (1).

4066669 is an equidigital number, since it uses as much as digits as its factorization.

4066669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 4066669 is about 2016.5983734993. The cubic root of 4066669 is about 159.6171706787.

The spelling of 4066669 in words is "four million, sixty-six thousand, six hundred sixty-nine".