6665506 has 8 divisors (see below), whose sum is σ = 10054044. Its totient is φ = 3314160.

The previous prime is 6665497. The next prime is 6665537. The reversal of 6665506 is 6055666.

It can be written as a sum of positive squares in 2 ways, for example, as 5331481 + 1334025 = 2309^2 + 1155^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 8845 + ... + 9568.

Almost surely, 2^6665506 is an apocalyptic number.

6665506 is a deficient number, since it is larger than the sum of its proper divisors (3388538).

6665506 is a wasteful number, since it uses less digits than its factorization.

6665506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18596.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 6665506 is about 2581.7641255545. The cubic root of 6665506 is about 188.1962828508.

The spelling of 6665506 in words is "six million, six hundred sixty-five thousand, five hundred six".