196563866 has 4 divisors (see below), whose sum is σ = 294845802. Its totient is φ = 98281932.

The previous prime is 196563853. The next prime is 196563889. The reversal of 196563866 is 668365691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 196420225 + 143641 = 14015^2 + 379^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 49140965 + ... + 49140968.

Almost surely, 2^196563866 is an apocalyptic number.

196563866 is a deficient number, since it is larger than the sum of its proper divisors (98281936).

196563866 is an equidigital number, since it uses as much as digits as its factorization.

196563866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98281935.

The product of its digits is 1399680, while the sum is 50.

The square root of 196563866 is about 14020.1236085849. The cubic root of 196563866 is about 581.4350769015.

The spelling of 196563866 in words is "one hundred ninety-six million, five hundred sixty-three thousand, eight hundred sixty-six".