6545778 has 8 divisors (see below), whose sum is σ = 13091568. Its totient is φ = 2181924.

The previous prime is 6545771. The next prime is 6545789. The reversal of 6545778 is 8775456.

6545778 is digitally balanced in base 4, 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.

6545778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6545771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545476 + ... + 545487.

It is an arithmetic number, because the mean of its divisors is an integer number (1636446).

Almost surely, 2^6545778 is an apocalyptic number.

6545778 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.

6545778 is a wasteful number, since it uses less digits than its factorization.

6545778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090968.

The product of its digits is 235200, while the sum is 42.

The square root of 6545778 is about 2558.4718094988. The cubic root of 6545778 is about 187.0626535652.

The spelling of 6545778 in words is "six million, five hundred forty-five thousand, seven hundred seventy-eight".