660984 has 16 divisors (see below), whose sum is σ = 1652520. Its totient is φ = 220320.

The previous prime is 660983. The next prime is 661009. The reversal of 660984 is 489066.

660984 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 (660983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13747 + ... + 13794.

2⁶⁶⁰⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

660984 is an abundant number, since it is smaller than the sum of its proper divisors (991536).

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

660984 is a wasteful number, since it uses less digits than its factorization.

660984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27550 (or 27546 counting only the distinct ones).

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

The square root of 660984 is about 813.0092250399. The cubic root of 660984 is about 87.1091245286.

The spelling of 660984 in words is "six hundred sixty thousand, nine hundred eighty-four".