1666312 has 16 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 806160.

The previous prime is 1666309. The next prime is 1666321. The reversal of 1666312 is 2136661.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3112 + ... + 3607.

It is an arithmetic number, because the mean of its divisors is an integer number (201600).

2^1666312 is an apocalyptic number.

It is an amenable number.

1666312 is a deficient number, since it is larger than the sum of its proper divisors (1559288).

1666312 is a wasteful number, since it uses less digits than its factorization.

1666312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756 (or 6752 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 1666312 is about 1290.8570796180. The cubic root of 1666312 is about 118.5546994764.

The spelling of 1666312 in words is "one million, six hundred sixty-six thousand, three hundred twelve".