195730668 has 168 divisors, whose sum is σ = 603266048. Its totient is φ = 54377568.

The previous prime is 195730663. The next prime is 195730681. The reversal of 195730668 is 866037591.

It is a happy number.

195730668 is a `hidden beast` number, since 19 + 573 + 0 + 6 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (195730663) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 877605 + ... + 877827.

Almost surely, 2^195730668 is an apocalyptic number.

195730668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195730668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301633024).

195730668 is an abundant number, since it is smaller than the sum of its proper divisors (407535380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195730668 is a wasteful number, since it uses less digits than its factorization.

195730668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 195730668 is about 13990.3776932576. The cubic root of 195730668 is about 580.6123813430.

The spelling of 195730668 in words is "one hundred ninety-five million, seven hundred thirty thousand, six hundred sixty-eight".