6667641 has 6 divisors (see below), whose sum is σ = 9631050. Its totient is φ = 4445088.

The previous prime is 6667637. The next prime is 6667643. The reversal of 6667641 is 1467666.

6667641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6610041 + 57600 = 2571^2 + 240^2 .

It is not a de Polignac number, because 6667641 - 2² = 6667637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6667596 and 6667605.

It is not an unprimeable number, because it can be changed into a prime (6667643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370416 + ... + 370433.

It is an arithmetic number, because the mean of its divisors is an integer number (1605175).

Almost surely, 2^6667641 is an apocalyptic number.

It is an amenable number.

6667641 is a deficient number, since it is larger than the sum of its proper divisors (2963409).

6667641 is a wasteful number, since it uses less digits than its factorization.

6667641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740855 (or 740852 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 6667641 is about 2582.1775694169. The cubic root of 6667641 is about 188.2163741573.

The spelling of 6667641 in words is "six million, six hundred sixty-seven thousand, six hundred forty-one".