4066739 has 4 divisors (see below), whose sum is σ = 4073424. Its totient is φ = 4060056.

The previous prime is 4066729. The next prime is 4066747. The reversal of 4066739 is 9376604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4066739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4066699 and 4066708.

It is not an unprimeable number, because it can be changed into a prime (4066709) 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 in 3 ways as a sum of consecutive naturals, for example, 2327 + ... + 3680.

It is an arithmetic number, because the mean of its divisors is an integer number (1018356).

Almost surely, 2^4066739 is an apocalyptic number.

4066739 is a deficient number, since it is larger than the sum of its proper divisors (6685).

4066739 is an equidigital number, since it uses as much as digits as its factorization.

4066739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 4066739 is about 2016.6157293843. The cubic root of 4066739 is about 159.6180865092.

The spelling of 4066739 in words is "four million, sixty-six thousand, seven hundred thirty-nine".