6536661 has 8 divisors (see below), whose sum is σ = 8739840. Its totient is φ = 4345632.

The previous prime is 6536659. The next prime is 6536693. The reversal of 6536661 is 1666356.

6536661 is digitally balanced in base 3, 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 6536661 - 2¹ = 6536659 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6536611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (1092480).

Almost surely, 2^6536661 is an apocalyptic number.

It is an amenable number.

6536661 is a deficient number, since it is larger than the sum of its proper divisors (2203179).

6536661 is a wasteful number, since it uses less digits than its factorization.

6536661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075.

The product of its digits is 19440, while the sum is 33.

The square root of 6536661 is about 2556.6894610023. The cubic root of 6536661 is about 186.9757658740.

The spelling of 6536661 in words is "six million, five hundred thirty-six thousand, six hundred sixty-one".