1662606 has 48 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 502200.

The previous prime is 1662593. The next prime is 1662611. The reversal of 1662606 is 6062661.

It is a super-2 number, since 2×1662606² = 5528517422472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1662606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5191 + ... + 5501.

It is an arithmetic number, because the mean of its divisors is an integer number (85176).

2^1662606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2044224).

1662606 is an abundant number, since it is smaller than the sum of its proper divisors (2425842).

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

1662606 is a wasteful number, since it uses less digits than its factorization.

1662606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 327 counting only the distinct ones).

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

The square root of 1662606 is about 1289.4208002045. The cubic root of 1662606 is about 118.4667427902.

It can be divided in two parts, 166 and 2606, that added together give a palindrome (2772).

The spelling of 1662606 in words is "one million, six hundred sixty-two thousand, six hundred six".