1656606 has 16 divisors (see below), whose sum is σ = 3786624. Its totient is φ = 473304.

The previous prime is 1656593. The next prime is 1656607. The reversal of 1656606 is 6066561.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656607) 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, 19680 + ... + 19763.

It is an arithmetic number, because the mean of its divisors is an integer number (236664).

2^1656606 is an apocalyptic number.

1656606 is an abundant number, since it is smaller than the sum of its proper divisors (2130018).

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

1656606 is a wasteful number, since it uses less digits than its factorization.

1656606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39455.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1656606 is about 1287.0920712987. The cubic root of 1656606 is about 118.3240637232.

The spelling of 1656606 in words is "one million, six hundred fifty-six thousand, six hundred six".