6636665 has 8 divisors (see below), whose sum is σ = 9101760. Its totient is φ = 4550832.

The previous prime is 6636661. The next prime is 6636667. The reversal of 6636665 is 5666366.

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

It is a cyclic number.

It is not a de Polignac number, because 6636665 - 2² = 6636661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6636661) 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 7 ways as a sum of consecutive naturals, for example, 94775 + ... + 94844.

It is an arithmetic number, because the mean of its divisors is an integer number (1137720).

Almost surely, 2^6636665 is an apocalyptic number.

It is an amenable number.

6636665 is a deficient number, since it is larger than the sum of its proper divisors (2465095).

6636665 is a wasteful number, since it uses less digits than its factorization.

6636665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189631.

The product of its digits is 116640, while the sum is 38.

The square root of 6636665 is about 2576.1725485689. The cubic root of 6636665 is about 187.9244547083.

Subtracting from 6636665 its reverse (5666366), we obtain a cube (970299 = 99³).

The spelling of 6636665 in words is "six million, six hundred thirty-six thousand, six hundred sixty-five".