196637668 has 12 divisors (see below), whose sum is σ = 347983020. Its totient is φ = 97213952.

The previous prime is 196637663. The next prime is 196637687. The reversal of 196637668 is 866736691.

It can be written as a sum of positive squares in 2 ways, for example, as 25080064 + 171557604 = 5008^2 + 13098^2 .

It is not an unprimeable number, because it can be changed into a prime (196637663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275821 + ... + 276532.

It is an arithmetic number, because the mean of its divisors is an integer number (28998585).

Almost surely, 2^196637668 is an apocalyptic number.

It is an amenable number.

196637668 is a deficient number, since it is larger than the sum of its proper divisors (151345352).

196637668 is a wasteful number, since it uses less digits than its factorization.

196637668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552446 (or 552444 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 196637668 is about 14022.7553640502. The cubic root of 196637668 is about 581.5078364632.

The spelling of 196637668 in words is "one hundred ninety-six million, six hundred thirty-seven thousand, six hundred sixty-eight".