5641665 has 16 divisors (see below), whose sum is σ = 9057408. Its totient is φ = 2998656.

The previous prime is 5641661. The next prime is 5641679. The reversal of 5641665 is 5661465.

It is not a de Polignac number, because 5641665 - 2² = 5641661 is a prime.

5641665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5641661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6444 + ... + 7266.

It is an arithmetic number, because the mean of its divisors is an integer number (566088).

Almost surely, 2^5641665 is an apocalyptic number.

It is an amenable number.

5641665 is a deficient number, since it is larger than the sum of its proper divisors (3415743).

5641665 is a wasteful number, since it uses less digits than its factorization.

5641665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its digits is 21600, while the sum is 33.

The square root of 5641665 is about 2375.2189372772. The cubic root of 5641665 is about 178.0201235507.

The spelling of 5641665 in words is "five million, six hundred forty-one thousand, six hundred sixty-five".