4066865 has 8 divisors (see below), whose sum is σ = 5323968. Its totient is φ = 2957680.

The previous prime is 4066861. The next prime is 4066871. The reversal of 4066865 is 5686604.

4066865 = 215² + 216² + ... + 280².

4066865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4066865 - 2² = 4066861 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4066861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36917 + ... + 37026.

It is an arithmetic number, because the mean of its divisors is an integer number (665496).

Almost surely, 2^4066865 is an apocalyptic number.

It is an amenable number.

4066865 is a deficient number, since it is larger than the sum of its proper divisors (1257103).

4066865 is a wasteful number, since it uses less digits than its factorization.

4066865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73959.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 4066865 is about 2016.6469696008. The cubic root of 4066865 is about 159.6197349775.

The spelling of 4066865 in words is "four million, sixty-six thousand, eight hundred sixty-five".