1995666 has 8 divisors (see below), whose sum is σ = 3991344. Its totient is φ = 665220.

The previous prime is 1995661. The next prime is 1995677. The reversal of 1995666 is 6665991.

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

1995666 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1995661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166300 + ... + 166311.

It is an arithmetic number, because the mean of its divisors is an integer number (498918).

2^1995666 is an apocalyptic number.

1995666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1995666 is a wasteful number, since it uses less digits than its factorization.

1995666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332616.

The product of its digits is 87480, while the sum is 42.

The square root of 1995666 is about 1412.6804309539. The cubic root of 1995666 is about 125.9010308747.

The spelling of 1995666 in words is "one million, nine hundred ninety-five thousand, six hundred sixty-six".