195666387841 has 8 divisors (see below), whose sum is σ = 206035044480. Its totient is φ = 185304773808.

The previous prime is 195666387799. The next prime is 195666387881. The reversal of 195666387841 is 148783666591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 195666387841 - 2¹⁷ = 195666256769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195666387881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703566 + ... + 1814791.

It is an arithmetic number, because the mean of its divisors is an integer number (25754380560).

Almost surely, 2^195666387841 is an apocalyptic number.

It is an amenable number.

195666387841 is a deficient number, since it is larger than the sum of its proper divisors (10368656639).

195666387841 is a wasteful number, since it uses less digits than its factorization.

195666387841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521303.

The product of its digits is 52254720, while the sum is 64.

The spelling of 195666387841 in words is "one hundred ninety-five billion, six hundred sixty-six million, three hundred eighty-seven thousand, eight hundred forty-one".