1664916 has 24 divisors (see below), whose sum is σ = 4238304. Its totient is φ = 504480.

The previous prime is 1664909. The next prime is 1664941. The reversal of 1664916 is 6194661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6175 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (176596).

2^1664916 is an apocalyptic number.

It is an amenable number.

1664916 is an abundant number, since it is smaller than the sum of its proper divisors (2573388).

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

1664916 is a wasteful number, since it uses less digits than its factorization.

1664916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12629 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 1664916 is about 1290.3162403070. The cubic root of 1664916 is about 118.5215827092.

The spelling of 1664916 in words is "one million, six hundred sixty-four thousand, nine hundred sixteen".