6647138 has 16 divisors (see below), whose sum is σ = 10535616. Its totient is φ = 3138960.

The previous prime is 6647129. The next prime is 6647141. The reversal of 6647138 is 8317466.

It is a junction number, because it is equal to n+sod(n) for n = 6647098 and 6647107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 4688.

It is an arithmetic number, because the mean of its divisors is an integer number (658476).

Almost surely, 2^6647138 is an apocalyptic number.

6647138 is a deficient number, since it is larger than the sum of its proper divisors (3888478).

6647138 is a wasteful number, since it uses less digits than its factorization.

6647138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849.

The product of its digits is 24192, while the sum is 35.

The square root of 6647138 is about 2578.2044139284. The cubic root of 6647138 is about 188.0232542534.

The spelling of 6647138 in words is "six million, six hundred forty-seven thousand, one hundred thirty-eight".