6663507 has 8 divisors (see below), whose sum is σ = 9407376. Its totient is φ = 4180992.

The previous prime is 6663499. The next prime is 6663511. The reversal of 6663507 is 7053666.

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

It is not a de Polignac number, because 6663507 - 2³ = 6663499 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6663557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65278 + ... + 65379.

It is an arithmetic number, because the mean of its divisors is an integer number (1175922).

Almost surely, 2^6663507 is an apocalyptic number.

6663507 is a deficient number, since it is larger than the sum of its proper divisors (2743869).

6663507 is a wasteful number, since it uses less digits than its factorization.

6663507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130677.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 6663507 is about 2581.3769581369. The cubic root of 6663507 is about 188.1774674758.

The spelling of 6663507 in words is "six million, six hundred sixty-three thousand, five hundred seven".