1663066 has 8 divisors (see below), whose sum is σ = 2519604. Its totient is φ = 823200.

The previous prime is 1663031. The next prime is 1663073. The reversal of 1663066 is 6603661.

It can be written as a sum of positive squares in 2 ways, for example, as 1635841 + 27225 = 1279^2 + 165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3915 + ... + 4318.

2^1663066 is an apocalyptic number.

1663066 is a deficient number, since it is larger than the sum of its proper divisors (856538).

1663066 is a wasteful number, since it uses less digits than its factorization.

1663066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1663066 is about 1289.5991625307. The cubic root of 1663066 is about 118.4776673422.

The spelling of 1663066 in words is "one million, six hundred sixty-three thousand, sixty-six".