591668 has 48 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 215040.

The previous prime is 591659. The next prime is 591673. The reversal of 591668 is 866195.

It is a congruent number.

It is an unprimeable number.

591668 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 15 ways as a sum of consecutive naturals, for example, 5180 + ... + 5292.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2⁵⁹¹⁶⁶⁸ 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 591668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689472).

591668 is an abundant number, since it is smaller than the sum of its proper divisors (787276).

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

591668 is a wasteful number, since it uses less digits than its factorization.

591668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 150 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 591668 is about 769.1995839832. The cubic root of 591668 is about 83.9510296579.

The spelling of 591668 in words is "five hundred ninety-one thousand, six hundred sixty-eight".