6540799 has 6 divisors (see below), whose sum is σ = 6657080. Its totient is φ = 6426516.

The previous prime is 6540739. The next prime is 6540827. The reversal of 6540799 is 9970456.

It is not a de Polignac number, because 6540799 - 2¹⁵ = 6508031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2542 + ... + 4420.

Almost surely, 2^6540799 is an apocalyptic number.

6540799 is a deficient number, since it is larger than the sum of its proper divisors (116281).

6540799 is an equidigital number, since it uses as much as digits as its factorization.

6540799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 6540799 is about 2557.4985825998. The cubic root of 6540799 is about 187.0152122373.

The spelling of 6540799 in words is "six million, five hundred forty thousand, seven hundred ninety-nine".