6639673 has 16 divisors (see below), whose sum is σ = 7451136. Its totient is φ = 5886720.

The previous prime is 6639653. The next prime is 6639679. The reversal of 6639673 is 3769366.

It is a cyclic number.

It is not a de Polignac number, because 6639673 - 2⁵ = 6639641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6639679) 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, 22515 + ... + 22807.

It is an arithmetic number, because the mean of its divisors is an integer number (465696).

Almost surely, 2^6639673 is an apocalyptic number.

It is an amenable number.

6639673 is a deficient number, since it is larger than the sum of its proper divisors (811463).

6639673 is a wasteful number, since it uses less digits than its factorization.

6639673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its digits is 122472, while the sum is 40.

The square root of 6639673 is about 2576.7562942583. The cubic root of 6639673 is about 187.9528420273.

The spelling of 6639673 in words is "six million, six hundred thirty-nine thousand, six hundred seventy-three".