6664805 has 16 divisors (see below), whose sum is σ = 9229440. Its totient is φ = 4525632.

The previous prime is 6664789. The next prime is 6664811. The reversal of 6664805 is 5084666.

It is a cyclic number.

It is not a de Polignac number, because 6664805 - 2⁴ = 6664789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2942 + ... + 4688.

It is an arithmetic number, because the mean of its divisors is an integer number (576840).

Almost surely, 2^6664805 is an apocalyptic number.

It is an amenable number.

6664805 is a deficient number, since it is larger than the sum of its proper divisors (2564635).

6664805 is a wasteful number, since it uses less digits than its factorization.

6664805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 6664805 is about 2581.6283621002. The cubic root of 6664805 is about 188.1896851912.

The spelling of 6664805 in words is "six million, six hundred sixty-four thousand, eight hundred five".