6540646 has 16 divisors (see below), whose sum is σ = 11250720. Its totient is φ = 2793600.

The previous prime is 6540643. The next prime is 6540673. The reversal of 6540646 is 6460456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540643) 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, 4846 + ... + 6046.

It is an arithmetic number, because the mean of its divisors is an integer number (703170).

Almost surely, 2^6540646 is an apocalyptic number.

6540646 is a deficient number, since it is larger than the sum of its proper divisors (4710074).

6540646 is a wasteful number, since it uses less digits than its factorization.

6540646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6540646 is about 2557.4686703848. The cubic root of 6540646 is about 187.0137540285.

The spelling of 6540646 in words is "six million, five hundred forty thousand, six hundred forty-six".