1668136 has 16 divisors (see below), whose sum is σ = 3158100. Its totient is φ = 825984.

The previous prime is 1668133. The next prime is 1668137. The reversal of 1668136 is 6318661.

It can be written as a sum of positive squares in 2 ways, for example, as 1512900 + 155236 = 1230^2 + 394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1668098 and 1668107.

It is not an unprimeable number, because it can be changed into a prime (1668131) 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, 85 + ... + 1828.

2^1668136 is an apocalyptic number.

It is an amenable number.

1668136 is a deficient number, since it is larger than the sum of its proper divisors (1489964).

1668136 is a wasteful number, since it uses less digits than its factorization.

1668136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2024 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 1668136 is about 1291.5633937210. The cubic root of 1668136 is about 118.5979416618.

The spelling of 1668136 in words is "one million, six hundred sixty-eight thousand, one hundred thirty-six".