663146216 has 8 divisors (see below), whose sum is σ = 1243399170. Its totient is φ = 331573104.

The previous prime is 663146213. The next prime is 663146221. The reversal of 663146216 is 612641366.

It can be written as a sum of positive squares in only one way, i.e., 657717316 + 5428900 = 25646^2 + 2330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (663146213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41446631 + ... + 41446646.

Almost surely, 2^663146216 is an apocalyptic number.

It is an amenable number.

663146216 is a deficient number, since it is larger than the sum of its proper divisors (580252954).

663146216 is a wasteful number, since it uses less digits than its factorization.

663146216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82893283 (or 82893279 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 663146216 is about 25751.6255020921. The cubic root of 663146216 is about 872.0400516071.

The spelling of 663146216 in words is "six hundred sixty-three million, one hundred forty-six thousand, two hundred sixteen".