4400665 has 4 divisors (see below), whose sum is σ = 5280804. Its totient is φ = 3520528.

The previous prime is 4400639. The next prime is 4400687. The reversal of 4400665 is 5660044.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3455881 + 944784 = 1859^2 + 972^2 .

It is a cyclic number.

It is not a de Polignac number, because 4400665 - 2¹³ = 4392473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440062 + ... + 440071.

It is an arithmetic number, because the mean of its divisors is an integer number (1320201).

Almost surely, 2^4400665 is an apocalyptic number.

It is an amenable number.

4400665 is a deficient number, since it is larger than the sum of its proper divisors (880139).

4400665 is an equidigital number, since it uses as much as digits as its factorization.

4400665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880138.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4400665 is about 2097.7762035069. The cubic root of 4400665 is about 163.8725089868.

The spelling of 4400665 in words is "four million, four hundred thousand, six hundred sixty-five".