1666048 has 22 divisors (see below), whose sum is σ = 3332516. Its totient is φ = 832512.

The previous prime is 1666043. The next prime is 1666061. The reversal of 1666048 is 8406661.

It is not an unprimeable number, because it can be changed into a prime (1666043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211 + ... + 1837.

It is an arithmetic number, because the mean of its divisors is an integer number (151478).

2^1666048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666258).

1666048 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1666048 is an equidigital number, since it uses as much as digits as its factorization.

1666048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1666048 is about 1290.7548179263. The cubic root of 1666048 is about 118.5484381253.

The spelling of 1666048 in words is "one million, six hundred sixty-six thousand, forty-eight".