196600661 has 2 divisors, whose sum is σ = 196600662. Its totient is φ = 196600660.

The previous prime is 196600643. The next prime is 196600759. The reversal of 196600661 is 166006691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182115025 + 14485636 = 13495^2 + 3806^2 .

It is an emirp because it is prime and its reverse (166006691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196600661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196600561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98300330 + 98300331.

It is an arithmetic number, because the mean of its divisors is an integer number (98300331).

Almost surely, 2^196600661 is an apocalyptic number.

It is an amenable number.

196600661 is a deficient number, since it is larger than the sum of its proper divisors (1).

196600661 is an equidigital number, since it uses as much as digits as its factorization.

196600661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 196600661 is about 14021.4357681373. The cubic root of 196600661 is about 581.4713544557.

The spelling of 196600661 in words is "one hundred ninety-six million, six hundred thousand, six hundred sixty-one".