1662706 has 8 divisors (see below), whose sum is σ = 2561580. Its totient is φ = 808848.

The previous prime is 1662701. The next prime is 1662707. The reversal of 1662706 is 6072661.

It can be written as a sum of positive squares in 2 ways, for example, as 1452025 + 210681 = 1205^2 + 459^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1662701) by changing a digit.

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, 11161 + ... + 11308.

2^1662706 is an apocalyptic number.

1662706 is a deficient number, since it is larger than the sum of its proper divisors (898874).

1662706 is a wasteful number, since it uses less digits than its factorization.

1662706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22508.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1662706 is about 1289.4595767220. The cubic root of 1662706 is about 118.4691178642.

The spelling of 1662706 in words is "one million, six hundred sixty-two thousand, seven hundred six".