6745558 has 4 divisors (see below), whose sum is σ = 10118340. Its totient is φ = 3372778.

The previous prime is 6745553. The next prime is 6745559. The reversal of 6745558 is 8555476.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×6745558³ (a number of 21 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6745558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1686388 + ... + 1686391.

It is an arithmetic number, because the mean of its divisors is an integer number (2529585).

Almost surely, 2^6745558 is an apocalyptic number.

6745558 is a deficient number, since it is larger than the sum of its proper divisors (3372782).

6745558 is a wasteful number, since it uses less digits than its factorization.

6745558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372781.

The product of its digits is 168000, while the sum is 40.

The square root of 6745558 is about 2597.2212073676. The cubic root of 6745558 is about 188.9466923183.

The spelling of 6745558 in words is "six million, seven hundred forty-five thousand, five hundred fifty-eight".