6665975 has 12 divisors (see below), whose sum is σ = 8625936. Its totient is φ = 5100480.

The previous prime is 6665959. The next prime is 6665987. The reversal of 6665975 is 5795666.

It is not a de Polignac number, because 6665975 - 2⁴ = 6665959 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5222 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (718828).

Almost surely, 2^6665975 is an apocalyptic number.

6665975 is a deficient number, since it is larger than the sum of its proper divisors (1959961).

6665975 is a wasteful number, since it uses less digits than its factorization.

6665975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626 (or 11621 counting only the distinct ones).

The product of its digits is 340200, while the sum is 44.

The square root of 6665975 is about 2581.8549533233. The cubic root of 6665975 is about 188.2006967186.

The spelling of 6665975 in words is "six million, six hundred sixty-five thousand, nine hundred seventy-five".