195430666 has 4 divisors (see below), whose sum is σ = 293146002. Its totient is φ = 97715332.

The previous prime is 195430649. The next prime is 195430667. The reversal of 195430666 is 666034591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 195412441 + 18225 = 13979^2 + 135^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (195430667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48857665 + ... + 48857668.

Almost surely, 2^195430666 is an apocalyptic number.

195430666 is a deficient number, since it is larger than the sum of its proper divisors (97715336).

195430666 is an equidigital number, since it uses as much as digits as its factorization.

195430666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97715335.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 195430666 is about 13979.6518554648. The cubic root of 195430666 is about 580.3155892494.

The spelling of 195430666 in words is "one hundred ninety-five million, four hundred thirty thousand, six hundred sixty-six".