195068661 has 4 divisors (see below), whose sum is σ = 260091552. Its totient is φ = 130045772.

The previous prime is 195068639. The next prime is 195068669. The reversal of 195068661 is 166860591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195068661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195068669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32511441 + ... + 32511446.

It is an arithmetic number, because the mean of its divisors is an integer number (65022888).

Almost surely, 2^195068661 is an apocalyptic number.

It is an amenable number.

195068661 is a deficient number, since it is larger than the sum of its proper divisors (65022891).

195068661 is an equidigital number, since it uses as much as digits as its factorization.

195068661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65022890.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 195068661 is about 13966.6982855648. The cubic root of 195068661 is about 579.9570529040.

The spelling of 195068661 in words is "one hundred ninety-five million, sixty-eight thousand, six hundred sixty-one".