195320866 has 16 divisors (see below), whose sum is σ = 315835128. Its totient is φ = 90057600.

The previous prime is 195320821. The next prime is 195320911. The reversal of 195320866 is 668023591.

It is an interprime number because it is at equal distance from previous prime (195320821) and next prime (195320911).

It can be written as a sum of positive squares in 4 ways, for example, as 154629225 + 40691641 = 12435^2 + 6379^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27526 + ... + 33886.

Almost surely, 2^195320866 is an apocalyptic number.

195320866 is a deficient number, since it is larger than the sum of its proper divisors (120514262).

195320866 is a wasteful number, since it uses less digits than its factorization.

195320866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 195320866 is about 13975.7241672838. The cubic root of 195320866 is about 580.2068881435.

The spelling of 195320866 in words is "one hundred ninety-five million, three hundred twenty thousand, eight hundred sixty-six".