195666028 has 12 divisors (see below), whose sum is σ = 360437560. Its totient is φ = 92683872.

The previous prime is 195665993. The next prime is 195666041. The reversal of 195666028 is 820666591.

It is a super-3 number, since 3×195666028³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287201 + ... + 1287352.

Almost surely, 2^195666028 is an apocalyptic number.

It is an amenable number.

195666028 is a deficient number, since it is larger than the sum of its proper divisors (164771532).

195666028 is a wasteful number, since it uses less digits than its factorization.

195666028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574576 (or 2574574 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 195666028 is about 13988.0673432751. The cubic root of 195666028 is about 580.5484586119.

The spelling of 195666028 in words is "one hundred ninety-five million, six hundred sixty-six thousand, twenty-eight".