6745578 has 32 divisors (see below), whose sum is σ = 16091136. Its totient is φ = 1843248.

The previous prime is 6745559. The next prime is 6745579. The reversal of 6745578 is 8755476.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 6³ + 7⁷ + 4⁴ + 5⁷ + 5⁷ + 7⁸ + 8³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2526 + ... + 4457.

It is an arithmetic number, because the mean of its divisors is an integer number (502848).

Almost surely, 2^6745578 is an apocalyptic number.

6745578 is an abundant number, since it is smaller than the sum of its proper divisors (9345558).

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

6745578 is a wasteful number, since it uses less digits than its factorization.

6745578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018.

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

The square root of 6745578 is about 2597.2250576336. The cubic root of 6745578 is about 188.9468790550.

The spelling of 6745578 in words is "six million, seven hundred forty-five thousand, five hundred seventy-eight".