6665242 has 8 divisors (see below), whose sum is σ = 10030356. Its totient is φ = 3321792.

The previous prime is 6665237. The next prime is 6665249. The reversal of 6665242 is 2425666.

It can be written as a sum of positive squares in 2 ways, for example, as 4165681 + 2499561 = 2041^2 + 1581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6665249) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4623 + ... + 5890.

Almost surely, 2^6665242 is an apocalyptic number.

6665242 is a deficient number, since it is larger than the sum of its proper divisors (3365114).

6665242 is a wasteful number, since it uses less digits than its factorization.

6665242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832.

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

The square root of 6665242 is about 2581.7129972172. The cubic root of 6665242 is about 188.1937981945.

The spelling of 6665242 in words is "six million, six hundred sixty-five thousand, two hundred forty-two".