6665995 has 16 divisors (see below), whose sum is σ = 9270720. Its totient is φ = 4506624.

The previous prime is 6665987. The next prime is 6666001. The reversal of 6665995 is 5995666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6665995 - 2³ = 6665987 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251 + ... + 3859.

It is an arithmetic number, because the mean of its divisors is an integer number (579420).

Almost surely, 2^6665995 is an apocalyptic number.

6665995 is a deficient number, since it is larger than the sum of its proper divisors (2604725).

6665995 is a wasteful number, since it uses less digits than its factorization.

6665995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694.

The product of its digits is 437400, while the sum is 46.

The square root of 6665995 is about 2581.8588265047. The cubic root of 6665995 is about 188.2008849386.

The spelling of 6665995 in words is "six million, six hundred sixty-five thousand, nine hundred ninety-five".