663140 has 24 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 260960.

The previous prime is 663127. The next prime is 663149. The reversal of 663140 is 41366.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663140.

It is not an unprimeable number, because it can be changed into a prime (663149) by changing a digit.

663140 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 7 ways as a sum of consecutive naturals, for example, 1187 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁶⁶³¹⁴⁰ is an apocalyptic number.

It is an amenable number.

663140 is an abundant number, since it is smaller than the sum of its proper divisors (752092).

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

663140 is a wasteful number, since it uses less digits than its factorization.

663140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 663140 is about 814.3340837764. The cubic root of 663140 is about 87.2037326910.

The spelling of 663140 in words is "six hundred sixty-three thousand, one hundred forty".