1666206 has 12 divisors (see below), whose sum is σ = 3610152. Its totient is φ = 555396.

The previous prime is 1666201. The next prime is 1666211. The reversal of 1666206 is 6026661.

It is an interprime number because it is at equal distance from previous prime (1666201) and next prime (1666211).

It is a self number, because there is not a number n which added to its sum of digits gives 1666206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46266 + ... + 46301.

It is an arithmetic number, because the mean of its divisors is an integer number (300846).

2^1666206 is an apocalyptic number.

1666206 is an abundant number, since it is smaller than the sum of its proper divisors (1943946).

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

1666206 is a wasteful number, since it uses less digits than its factorization.

1666206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92575 (or 92572 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1666206 is about 1290.8160209728. The cubic root of 1666206 is about 118.5521855285.

The spelling of 1666206 in words is "one million, six hundred sixty-six thousand, two hundred six".