1664608 has 24 divisors (see below), whose sum is σ = 3575880. Its totient is φ = 756480.

The previous prime is 1664569. The next prime is 1664627. The reversal of 1664608 is 8064661.

It is a self number, because there is not a number n which added to its sum of digits gives 1664608.

It is a congruent number.

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, 2013 + ... + 2716.

It is an arithmetic number, because the mean of its divisors is an integer number (148995).

2^1664608 is an apocalyptic number.

It is an amenable number.

1664608 is an abundant number, since it is smaller than the sum of its proper divisors (1911272).

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

1664608 is a wasteful number, since it uses less digits than its factorization.

1664608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750 (or 4742 counting only the distinct ones).

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

The square root of 1664608 is about 1290.1968842002. The cubic root of 1664608 is about 118.5142736520.

It can be divided in two parts, 166 and 4608, that added together give a palindrome (4774).

The spelling of 1664608 in words is "one million, six hundred sixty-four thousand, six hundred eight".