6745668 has 48 divisors (see below), whose sum is σ = 17075520. Its totient is φ = 2064384.

The previous prime is 6745667. The next prime is 6745679. The reversal of 6745668 is 8665476.

It is a happy number.

6745668 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 7.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (6745663) 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, 8388 + ... + 9156.

It is an arithmetic number, because the mean of its divisors is an integer number (355740).

Almost surely, 2^6745668 is an apocalyptic number.

6745668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6745668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8537760).

6745668 is an abundant number, since it is smaller than the sum of its proper divisors (10329852).

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

6745668 is a wasteful number, since it uses less digits than its factorization.

6745668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 834 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 6745668 is about 2597.2423837601. The cubic root of 6745668 is about 188.9477193657.

The spelling of 6745668 in words is "six million, seven hundred forty-five thousand, six hundred sixty-eight".