1606655 has 4 divisors (see below), whose sum is σ = 1927992. Its totient is φ = 1285320.

The previous prime is 1606643. The next prime is 1606663. The reversal of 1606655 is 5566061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5566061 = 1663 ⋅3347.

It is not a de Polignac number, because 1606655 - 2⁴ = 1606639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160661 + ... + 160670.

It is an arithmetic number, because the mean of its divisors is an integer number (481998).

2^1606655 is an apocalyptic number.

1606655 is a deficient number, since it is larger than the sum of its proper divisors (321337).

1606655 is an equidigital number, since it uses as much as digits as its factorization.

1606655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321336.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1606655 is about 1267.5389540365. The cubic root of 1606655 is about 117.1226463673.

The spelling of 1606655 in words is "one million, six hundred six thousand, six hundred fifty-five".