1668536 has 16 divisors (see below), whose sum is σ = 3205440. Its totient is φ = 813760.

The previous prime is 1668521. The next prime is 1668539. The reversal of 1668536 is 6358661.

It is a junction number, because it is equal to n+sod(n) for n = 1668496 and 1668505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668539) 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, 2216 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

2^1668536 is an apocalyptic number.

It is an amenable number.

1668536 is a deficient number, since it is larger than the sum of its proper divisors (1536904).

1668536 is a wasteful number, since it uses less digits than its factorization.

1668536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134 (or 5130 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 1668536 is about 1291.7182355297. The cubic root of 1668536 is about 118.6074203825.

The spelling of 1668536 in words is "one million, six hundred sixty-eight thousand, five hundred thirty-six".