4066729 has 2 divisors, whose sum is σ = 4066730. Its totient is φ = 4066728.

The previous prime is 4066721. The next prime is 4066747. The reversal of 4066729 is 9276604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2812329 + 1254400 = 1677^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 4066729 - 2³ = 4066721 is a prime.

4066729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4066694 and 4066703.

It is not a weakly prime, because it can be changed into another prime (4066721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2033364 + 2033365.

It is an arithmetic number, because the mean of its divisors is an integer number (2033365).

Almost surely, 2^4066729 is an apocalyptic number.

It is an amenable number.

4066729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4066729 is an equidigital number, since it uses as much as digits as its factorization.

4066729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 4066729 is about 2016.6132499813. The cubic root of 4066729 is about 159.6179556769.

The spelling of 4066729 in words is "four million, sixty-six thousand, seven hundred twenty-nine".