663214660 has 24 divisors (see below), whose sum is σ = 1453306176. Its totient is φ = 253751520.

The previous prime is 663214649. The next prime is 663214667. The reversal of 663214660 is 66412366.

663214660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (663214667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720426 + ... + 721345.

It is an arithmetic number, because the mean of its divisors is an integer number (60554424).

Almost surely, 2^663214660 is an apocalyptic number.

It is an amenable number.

663214660 is an abundant number, since it is smaller than the sum of its proper divisors (790091516).

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

663214660 is a wasteful number, since it uses less digits than its factorization.

663214660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441803 (or 1441801 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 663214660 is about 25752.9543936225. The cubic root of 663214660 is about 872.0700519572.

The spelling of 663214660 in words is "six hundred sixty-three million, two hundred fourteen thousand, six hundred sixty".