1660906 has 16 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 759024.

The previous prime is 1660889. The next prime is 1660921. The reversal of 1660906 is 6090661.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 3051 + ... + 3553.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2^1660906 is an apocalyptic number.

1660906 is a deficient number, since it is larger than the sum of its proper divisors (1048598).

1660906 is a wasteful number, since it uses less digits than its factorization.

1660906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1660906 is about 1288.7614208999. The cubic root of 1660906 is about 118.4263519535.

The spelling of 1660906 in words is "one million, six hundred sixty thousand, nine hundred six".