6668745 has 16 divisors (see below), whose sum is σ = 10705920. Its totient is φ = 3544704.

The previous prime is 6668737. The next prime is 6668747. The reversal of 6668745 is 5478666.

It is a happy number.

It is not a de Polignac number, because 6668745 - 2³ = 6668737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6668697 and 6668706.

It is not an unprimeable number, because it can be changed into a prime (6668747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5592 + ... + 6678.

It is an arithmetic number, because the mean of its divisors is an integer number (669120).

Almost surely, 2^6668745 is an apocalyptic number.

It is an amenable number.

6668745 is a deficient number, since it is larger than the sum of its proper divisors (4037175).

6668745 is a wasteful number, since it uses less digits than its factorization.

6668745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

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

The square root of 6668745 is about 2582.3913336286. The cubic root of 6668745 is about 188.2267616096.

The spelling of 6668745 in words is "six million, six hundred sixty-eight thousand, seven hundred forty-five".