195421009066 has 8 divisors (see below), whose sum is σ = 296153488260. Its totient is φ = 96703179648.

The previous prime is 195421009033. The next prime is 195421009067. The reversal of 195421009066 is 660900124591.

It can be written as a sum of positive squares in 2 ways, for example, as 170751594841 + 24669414225 = 413221^2 + 157065^2 .

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

It is not an unprimeable number, because it can be changed into a prime (195421009067) 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, 503662201 + ... + 503662588.

Almost surely, 2^195421009066 is an apocalyptic number.

195421009066 is a deficient number, since it is larger than the sum of its proper divisors (100732479194).

195421009066 is a wasteful number, since it uses less digits than its factorization.

195421009066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007324888.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 195421009066 in words is "one hundred ninety-five billion, four hundred twenty-one million, nine thousand, sixty-six".