511664 has 20 divisors (see below), whose sum is σ = 1003656. Its totient is φ = 252672.

The previous prime is 511633. The next prime is 511669. The reversal of 511664 is 466115.

It is not an unprimeable number, because it can be changed into a prime (511669) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1667 + ... + 1949.

2⁵¹¹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

511664 is a deficient number, since it is larger than the sum of its proper divisors (491992).

511664 is a wasteful number, since it uses less digits than its factorization.

511664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 398 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 511664 is about 715.3069271299. The cubic root of 511664 is about 79.9824961705.

Adding to 511664 its reverse (466115), we get a palindrome (977779).

The spelling of 511664 in words is "five hundred eleven thousand, six hundred sixty-four".