6540775 has 6 divisors (see below), whose sum is σ = 8110592. Its totient is φ = 5232600.

The previous prime is 6540739. The next prime is 6540827. The reversal of 6540775 is 5770456.

It is not a de Polignac number, because 6540775 - 2¹⁷ = 6409703 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 6540775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130791 + ... + 130840.

Almost surely, 2^6540775 is an apocalyptic number.

6540775 is a deficient number, since it is larger than the sum of its proper divisors (1569817).

6540775 is a wasteful number, since it uses less digits than its factorization.

6540775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261641 (or 261636 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 6540775 is about 2557.4938905108. The cubic root of 6540775 is about 187.0149835001.

The spelling of 6540775 in words is "six million, five hundred forty thousand, seven hundred seventy-five".