511668 has 36 divisors (see below), whose sum is σ = 1320228. Its totient is φ = 167040.

The previous prime is 511633. The next prime is 511669. The reversal of 511668 is 866115.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 459684 = 228^2 + 678^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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

511668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2080 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (36673).

2⁵¹¹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660114).

511668 is an abundant number, since it is smaller than the sum of its proper divisors (808560).

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

511668 is a wasteful number, since it uses less digits than its factorization.

511668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 299 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 511668 is about 715.3097231270. The cubic root of 511668 is about 79.9827045945.

It can be divided in two parts, 5116 and 68, that added together give a square (5184 = 72²).

The spelling of 511668 in words is "five hundred eleven thousand, six hundred sixty-eight".