195781466 has 8 divisors (see below), whose sum is σ = 295617504. Its totient is φ = 97242300.

The previous prime is 195781463. The next prime is 195781477. The reversal of 195781466 is 664187591.

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

It is a self number, because there is not a number n which added to its sum of digits gives 195781466.

It is not an unprimeable number, because it can be changed into a prime (195781463) 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, 323840 + ... + 324443.

It is an arithmetic number, because the mean of its divisors is an integer number (36952188).

Almost surely, 2^195781466 is an apocalyptic number.

195781466 is a deficient number, since it is larger than the sum of its proper divisors (99836038).

195781466 is a wasteful number, since it uses less digits than its factorization.

195781466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648436.

The product of its digits is 362880, while the sum is 47.

The square root of 195781466 is about 13992.1930375478. The cubic root of 195781466 is about 580.6626057950.

The spelling of 195781466 in words is "one hundred ninety-five million, seven hundred eighty-one thousand, four hundred sixty-six".