660896 has 24 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 312768.

The previous prime is 660893. The next prime is 660899. The reversal of 660896 is 698066.

It is an interprime number because it is at equal distance from previous prime (660893) and next prime (660899).

It is not an unprimeable number, because it can be changed into a prime (660893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 1151.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2⁶⁶⁰⁸⁹⁶ 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 660896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685440).

660896 is an abundant number, since it is smaller than the sum of its proper divisors (709984).

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

660896 is a wasteful number, since it uses less digits than its factorization.

660896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 660896 is about 812.9551033114. The cubic root of 660896 is about 87.1052586038.

The spelling of 660896 in words is "six hundred sixty thousand, eight hundred ninety-six".