1316666 has 16 divisors (see below), whose sum is σ = 2154600. Its totient is φ = 599808.

The previous prime is 1316657. The next prime is 1316669. The reversal of 1316666 is 6666131.

It can be written as a sum of positive squares in 4 ways, for example, as 461041 + 855625 = 679^2 + 925^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1316669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 2598.

2^1316666 is an apocalyptic number.

1316666 is a deficient number, since it is larger than the sum of its proper divisors (837934).

1316666 is a wasteful number, since it uses less digits than its factorization.

1316666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its digits is 3888, while the sum is 29.

The square root of 1316666 is about 1147.4606747074. The cubic root of 1316666 is about 109.6036979057.

The spelling of 1316666 in words is "one million, three hundred sixteen thousand, six hundred sixty-six".