6663685 has 8 divisors (see below), whose sum is σ = 9138816. Its totient is φ = 4569360.

The previous prime is 6663673. The next prime is 6663731. The reversal of 6663685 is 5863666.

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

It is not a de Polignac number, because 6663685 - 2⁵ = 6663653 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 95161 + ... + 95230.

It is an arithmetic number, because the mean of its divisors is an integer number (1142352).

Almost surely, 2^6663685 is an apocalyptic number.

It is an amenable number.

6663685 is a deficient number, since it is larger than the sum of its proper divisors (2475131).

6663685 is a wasteful number, since it uses less digits than its factorization.

6663685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190403.

The product of its digits is 155520, while the sum is 40.

The square root of 6663685 is about 2581.4114356297. The cubic root of 6663685 is about 188.1791430345.

The spelling of 6663685 in words is "six million, six hundred sixty-three thousand, six hundred eighty-five".