663460 has 36 divisors (see below), whose sum is σ = 1623132. Its totient is φ = 227136.

The previous prime is 663437. The next prime is 663463. The reversal of 663460 is 64366.

It is a happy number.

663460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 153664 = 714^2 + 392^2 .

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (663463) by changing a digit.

663460 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, 642 + ... + 1318.

It is an arithmetic number, because the mean of its divisors is an integer number (45087).

2⁶⁶³⁴⁶⁰ 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 663460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811566).

663460 is an abundant number, since it is smaller than the sum of its proper divisors (959672).

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

663460 is a wasteful number, since it uses less digits than its factorization.

663460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 663460 is about 814.5305396362. The cubic root of 663460 is about 87.2177572344.

The spelling of 663460 in words is "six hundred sixty-three thousand, four hundred sixty".