195668078 has 4 divisors (see below), whose sum is σ = 293502120. Its totient is φ = 97834038.

The previous prime is 195668071. The next prime is 195668087. The reversal of 195668078 is 870866591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 870866591 = 7 ⋅124409513.

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 as a sum of consecutive naturals, namely, 48917018 + ... + 48917021.

It is an arithmetic number, because the mean of its divisors is an integer number (73375530).

Almost surely, 2^195668078 is an apocalyptic number.

195668078 is a deficient number, since it is larger than the sum of its proper divisors (97834042).

195668078 is an equidigital number, since it uses as much as digits as its factorization.

195668078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97834041.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 195668078 is about 13988.1406198251. The cubic root of 195668078 is about 580.5504860805.

The spelling of 195668078 in words is "one hundred ninety-five million, six hundred sixty-eight thousand, seventy-eight".