6656918 has 4 divisors (see below), whose sum is σ = 9985380. Its totient is φ = 3328458.

The previous prime is 6656917. The next prime is 6656927. The reversal of 6656918 is 8196566.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1664228 + ... + 1664231.

It is an arithmetic number, because the mean of its divisors is an integer number (2496345).

Almost surely, 2^6656918 is an apocalyptic number.

6656918 is a deficient number, since it is larger than the sum of its proper divisors (3328462).

6656918 is a wasteful number, since it uses less digits than its factorization.

6656918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328461.

The product of its digits is 77760, while the sum is 41.

The square root of 6656918 is about 2580.1003856439. The cubic root of 6656918 is about 188.1154225578.

The spelling of 6656918 in words is "six million, six hundred fifty-six thousand, nine hundred eighteen".