6540078 has 8 divisors (see below), whose sum is σ = 13080168. Its totient is φ = 2180024.

The previous prime is 6540067. The next prime is 6540103. The reversal of 6540078 is 8700456.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

6540078 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 545001 + ... + 545012.

It is an arithmetic number, because the mean of its divisors is an integer number (1635021).

Almost surely, 2^6540078 is an apocalyptic number.

6540078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6540078 is a wasteful number, since it uses less digits than its factorization.

6540078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090018.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 6540078 is about 2557.3576206702. The cubic root of 6540078 is about 187.0083403488.

The spelling of 6540078 in words is "six million, five hundred forty thousand, seventy-eight".