663630285 has 32 divisors (see below), whose sum is σ = 1081752192. Its totient is φ = 347316480.

The previous prime is 663630281. The next prime is 663630301. The reversal of 663630285 is 582036366.

It is a happy number.

It is not a de Polignac number, because 663630285 - 2² = 663630281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663630281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756267 + ... + 757143.

It is an arithmetic number, because the mean of its divisors is an integer number (33804756).

Almost surely, 2^663630285 is an apocalyptic number.

It is an amenable number.

663630285 is a deficient number, since it is larger than the sum of its proper divisors (418121907).

663630285 is a wasteful number, since it uses less digits than its factorization.

663630285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 663630285 is about 25761.0225922808. The cubic root of 663630285 is about 872.2521842536.

The spelling of 663630285 in words is "six hundred sixty-three million, six hundred thirty thousand, two hundred eighty-five".