1666448 has 20 divisors (see below), whose sum is σ = 3690240. Its totient is φ = 714144.

The previous prime is 1666447. The next prime is 1666477. The reversal of 1666448 is 8446661.

It is not an unprimeable number, because it can be changed into a prime (1666447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7328 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (184512).

2^1666448 is an apocalyptic number.

It is an amenable number.

1666448 is an abundant number, since it is smaller than the sum of its proper divisors (2023792).

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

1666448 is a wasteful number, since it uses less digits than its factorization.

1666448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14894 (or 14888 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 1666448 is about 1290.9097567220. The cubic root of 1666448 is about 118.5579247629.

The spelling of 1666448 in words is "one million, six hundred sixty-six thousand, four hundred forty-eight".