44001665 has 8 divisors (see below), whose sum is σ = 53287080. Its totient is φ = 34877952.

The previous prime is 44001653. The next prime is 44001667. The reversal of 44001665 is 56610044.

It is a happy number.

44001665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21939856 + 22061809 = 4684^2 + 4697^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 44001665 - 2⁴ = 44001649 is a prime.

It is a super-2 number, since 2×44001665² = 3872293045544450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44001667) 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 7 ways as a sum of consecutive naturals, for example, 39824 + ... + 40913.

It is an arithmetic number, because the mean of its divisors is an integer number (6660885).

Almost surely, 2^44001665 is an apocalyptic number.

It is an amenable number.

44001665 is a deficient number, since it is larger than the sum of its proper divisors (9285415).

44001665 is a wasteful number, since it uses less digits than its factorization.

44001665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80851.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 44001665 is about 6633.3750836207. The cubic root of 44001665 is about 353.0392865295.

The spelling of 44001665 in words is "forty-four million, one thousand, six hundred sixty-five".