196056661 has 2 divisors, whose sum is σ = 196056662. Its totient is φ = 196056660.

The previous prime is 196056659. The next prime is 196056667. The reversal of 196056661 is 166650691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143856036 + 52200625 = 11994^2 + 7225^2 .

It is a cyclic number.

It is not a de Polignac number, because 196056661 - 2¹ = 196056659 is a prime.

Together with 196056659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196056667) 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 as a sum of consecutive naturals, namely, 98028330 + 98028331.

It is an arithmetic number, because the mean of its divisors is an integer number (98028331).

Almost surely, 2^196056661 is an apocalyptic number.

It is an amenable number.

196056661 is a deficient number, since it is larger than the sum of its proper divisors (1).

196056661 is an equidigital number, since it uses as much as digits as its factorization.

196056661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 196056661 is about 14002.0234609145. The cubic root of 196056661 is about 580.9345427267.

The spelling of 196056661 in words is "one hundred ninety-six million, fifty-six thousand, six hundred sixty-one".