663227812 has 48 divisors (see below), whose sum is σ = 1296801072. Its totient is φ = 294796800.

The previous prime is 663227801. The next prime is 663227819. The reversal of 663227812 is 218722366.

It can be written as a sum of positive squares in 8 ways, for example, as 210134016 + 453093796 = 14496^2 + 21286^2 .

It is a super-2 number, since 2×663227812² = 879742261220614688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (663227819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192618 + ... + 196030.

It is an arithmetic number, because the mean of its divisors is an integer number (27016689).

Almost surely, 2^663227812 is an apocalyptic number.

It is an amenable number.

663227812 is a deficient number, since it is larger than the sum of its proper divisors (633573260).

663227812 is a wasteful number, since it uses less digits than its factorization.

663227812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568 (or 3566 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 663227812 is about 25753.2097417002. The cubic root of 663227812 is about 872.0758165008.

The spelling of 663227812 in words is "six hundred sixty-three million, two hundred twenty-seven thousand, eight hundred twelve".