6647942 has 16 divisors (see below), whose sum is σ = 11489280. Its totient is φ = 2825928.

The previous prime is 6647939. The next prime is 6647947. The reversal of 6647942 is 2497466.

It is a junction number, because it is equal to n+sod(n) for n = 6647896 and 6647905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92 + ... + 3647.

It is an arithmetic number, because the mean of its divisors is an integer number (718080).

Almost surely, 2^6647942 is an apocalyptic number.

6647942 is a deficient number, since it is larger than the sum of its proper divisors (4841338).

6647942 is a wasteful number, since it uses less digits than its factorization.

6647942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875.

The product of its digits is 72576, while the sum is 38.

The square root of 6647942 is about 2578.3603316837. The cubic root of 6647942 is about 188.0308346889.

The spelling of 6647942 in words is "six million, six hundred forty-seven thousand, nine hundred forty-two".