6667656 has 32 divisors (see below), whose sum is σ = 16736640. Its totient is φ = 2213568.

The previous prime is 6667643. The next prime is 6667657. The reversal of 6667656 is 6567666.

It is not an unprimeable number, because it can be changed into a prime (6667657) 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, 8430 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (523020).

Almost surely, 2^6667656 is an apocalyptic number.

It is an amenable number.

6667656 is an abundant number, since it is smaller than the sum of its proper divisors (10068984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6667656 is a wasteful number, since it uses less digits than its factorization.

6667656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1129 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 6667656 is about 2582.1804739406. The cubic root of 6667656 is about 188.2165152988.

The spelling of 6667656 in words is "six million, six hundred sixty-seven thousand, six hundred fifty-six".