1664334 has 96 divisors (see below), whose sum is σ = 4678560. Its totient is φ = 435456.

The previous prime is 1664291. The next prime is 1664353. The reversal of 1664334 is 4334661.

1664334 is a `hidden beast` number, since 16 + 643 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1664298 and 1664307.

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 47 ways as a sum of consecutive naturals, for example, 44964 + ... + 45000.

It is an arithmetic number, because the mean of its divisors is an integer number (48735).

2^1664334 is an apocalyptic number.

1664334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339280).

1664334 is an abundant number, since it is smaller than the sum of its proper divisors (3014226).

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

1664334 is a wasteful number, since it uses less digits than its factorization.

1664334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 66 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1664334 is about 1290.0906944862. The cubic root of 1664334 is about 118.5077706809.

Adding to 1664334 its reverse (4334661), we get a palindrome (5998995).

The spelling of 1664334 in words is "one million, six hundred sixty-four thousand, three hundred thirty-four".