1664336 has 10 divisors (see below), whose sum is σ = 3224682. Its totient is φ = 832160.

The previous prime is 1664291. The next prime is 1664353. The reversal of 1664336 is 6334661.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 126736 = 1240^2 + 356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1664299 and 1664308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51995 + ... + 52026.

2^1664336 is an apocalyptic number.

1664336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1664336 is a deficient number, since it is larger than the sum of its proper divisors (1560346).

1664336 is a wasteful number, since it uses less digits than its factorization.

1664336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104029 (or 104023 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

The square root of 1664336 is about 1290.0914696253. The cubic root of 1664336 is about 118.5078181505.

Adding to 1664336 its reverse (6334661), we get a palindrome (7998997).

The spelling of 1664336 in words is "one million, six hundred sixty-four thousand, three hundred thirty-six".