6533665 has 4 divisors (see below), whose sum is σ = 7840404. Its totient is φ = 5226928.

The previous prime is 6533651. The next prime is 6533669. The reversal of 6533665 is 5663356.

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 2408704 + 4124961 = 1552^2 + 2031^2 .

It is a cyclic number.

It is not a de Polignac number, because 6533665 - 2¹¹ = 6531617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6533665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6533669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653362 + ... + 653371.

It is an arithmetic number, because the mean of its divisors is an integer number (1960101).

Almost surely, 2^6533665 is an apocalyptic number.

It is an amenable number.

6533665 is a deficient number, since it is larger than the sum of its proper divisors (1306739).

6533665 is a wasteful number, since it uses less digits than its factorization.

6533665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306738.

The product of its digits is 48600, while the sum is 34.

The square root of 6533665 is about 2556.1034799084. The cubic root of 6533665 is about 186.9471954770.

The spelling of 6533665 in words is "six million, five hundred thirty-three thousand, six hundred sixty-five".