6660005 has 24 divisors (see below), whose sum is σ = 9283680. Its totient is φ = 4547840.

The previous prime is 6659977. The next prime is 6660011. The reversal of 6660005 is 5000666.

It is a happy number.

It is not a de Polignac number, because 6660005 - 2⁶ = 6659941 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15686 + ... + 16104.

It is an arithmetic number, because the mean of its divisors is an integer number (386820).

Almost surely, 2^6660005 is an apocalyptic number.

It is an amenable number.

6660005 is a deficient number, since it is larger than the sum of its proper divisors (2623675).

6660005 is a wasteful number, since it uses less digits than its factorization.

6660005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 6660005 is about 2580.6985488429. The cubic root of 6660005 is about 188.1444962006.

The spelling of 6660005 in words is "six million, six hundred sixty thousand, five".