660894 has 32 divisors (see below), whose sum is σ = 1468320. Its totient is φ = 196992.

The previous prime is 660893. The next prime is 660899. The reversal of 660894 is 498066.

660894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2772 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (45885).

2⁶⁶⁰⁸⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734160).

660894 is an abundant number, since it is smaller than the sum of its proper divisors (807426).

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

660894 is a wasteful number, since it uses less digits than its factorization.

660894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 660894 is about 812.9538732302. The cubic root of 660894 is about 87.1051707379.

The spelling of 660894 in words is "six hundred sixty thousand, eight hundred ninety-four".