663206698 has 16 divisors (see below), whose sum is σ = 1240282944. Its totient is φ = 258392160.

The previous prime is 663206689. The next prime is 663206699. The reversal of 663206698 is 896602366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (663206699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2153115 + ... + 2153422.

It is an arithmetic number, because the mean of its divisors is an integer number (77517684).

Almost surely, 2^663206698 is an apocalyptic number.

663206698 is a deficient number, since it is larger than the sum of its proper divisors (577076246).

663206698 is a wasteful number, since it uses less digits than its factorization.

663206698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306557.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 663206698 is about 25752.7998089528. The cubic root of 663206698 is about 872.0665621622.

The spelling of 663206698 in words is "six hundred sixty-three million, two hundred six thousand, six hundred ninety-eight".