1660206 has 16 divisors (see below), whose sum is σ = 3358800. Its totient is φ = 547008.

The previous prime is 1660199. The next prime is 1660207. The reversal of 1660206 is 6020661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (209925).

2^1660206 is an apocalyptic number.

1660206 is an abundant number, since it is smaller than the sum of its proper divisors (1698594).

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

1660206 is a wasteful number, since it uses less digits than its factorization.

1660206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1660206 is about 1288.4898136966. The cubic root of 1660206 is about 118.4097124215.

Adding to 1660206 its reverse (6020661), we get a palindrome (7680867).

The spelling of 1660206 in words is "one million, six hundred sixty thousand, two hundred six".