2006665 has 8 divisors (see below), whose sum is σ = 2459520. Its totient is φ = 1570992.

The previous prime is 2006659. The next prime is 2006671. The reversal of 2006665 is 5666002.

It is an interprime number because it is at equal distance from previous prime (2006659) and next prime (2006671).

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 2006665 - 2³ = 2006657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4035 + ... + 4504.

It is an arithmetic number, because the mean of its divisors is an integer number (307440).

2^2006665 is an apocalyptic number.

It is an amenable number.

2006665 is a deficient number, since it is larger than the sum of its proper divisors (452855).

2006665 is an equidigital number, since it uses as much as digits as its factorization.

2006665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2006665 is about 1416.5680357823. The cubic root of 2006665 is about 126.1319060386.

The spelling of 2006665 in words is "two million, six thousand, six hundred sixty-five".