6656242 has 4 divisors (see below), whose sum is σ = 9984366. Its totient is φ = 3328120.

The previous prime is 6656239. The next prime is 6656257. The reversal of 6656242 is 2426566.

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

It can be written as a sum of positive squares in only one way, i.e., 4124961 + 2531281 = 2031^2 + 1591^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1664059 + ... + 1664062.

Almost surely, 2^6656242 is an apocalyptic number.

6656242 is a deficient number, since it is larger than the sum of its proper divisors (3328124).

6656242 is a wasteful number, since it uses less digits than its factorization.

6656242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328123.

The product of its digits is 17280, while the sum is 31.

The square root of 6656242 is about 2579.9693796633. The cubic root of 6656242 is about 188.1090547296.

The spelling of 6656242 in words is "six million, six hundred fifty-six thousand, two hundred forty-two".