395666 has 8 divisors (see below), whose sum is σ = 597324. Its totient is φ = 196560.

The previous prime is 395657. The next prime is 395671. The reversal of 395666 is 666593.

It can be written as a sum of positive squares in 2 ways, for example, as 395641 + 25 = 629^2 + 5^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

395666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185 + ... + 908.

2³⁹⁵⁶⁶⁶ is an apocalyptic number.

395666 is a deficient number, since it is larger than the sum of its proper divisors (201658).

395666 is a wasteful number, since it uses less digits than its factorization.

395666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its digits is 29160, while the sum is 35.

The square root of 395666 is about 629.0198725001. The cubic root of 395666 is about 73.4135531700.

The spelling of 395666 in words is "three hundred ninety-five thousand, six hundred sixty-six".