195668077 has 4 divisors (see below), whose sum is σ = 213456096. Its totient is φ = 177880060.

The previous prime is 195668071. The next prime is 195668087. The reversal of 195668077 is 770866591.

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 not a de Polignac number, because 195668077 - 2¹⁹ = 195143789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195668077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195668071) 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, 8893993 + ... + 8894014.

It is an arithmetic number, because the mean of its divisors is an integer number (53364024).

Almost surely, 2^195668077 is an apocalyptic number.

It is an amenable number.

195668077 is a deficient number, since it is larger than the sum of its proper divisors (17788019).

195668077 is a wasteful number, since it uses less digits than its factorization.

195668077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17788018.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 195668077 is about 13988.1405840805. The cubic root of 195668077 is about 580.5504850915.

The spelling of 195668077 in words is "one hundred ninety-five million, six hundred sixty-eight thousand, seventy-seven".