195666889964 has 36 divisors (see below), whose sum is σ = 428962033584. Its totient is φ = 77406680736.

The previous prime is 195666889903. The next prime is 195666889967. The reversal of 195666889964 is 469988666591.

It is not an unprimeable number, because it can be changed into a prime (195666889967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38393624 + ... + 38398719.

It is an arithmetic number, because the mean of its divisors is an integer number (11915612044).

Almost surely, 2^195666889964 is an apocalyptic number.

195666889964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

195666889964 is an abundant number, since it is smaller than the sum of its proper divisors (233295143620).

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

195666889964 is a wasteful number, since it uses less digits than its factorization.

195666889964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76792374 (or 76792365 counting only the distinct ones).

The product of its digits is 1209323520, while the sum is 77.

The spelling of 195666889964 in words is "one hundred ninety-five billion, six hundred sixty-six million, eight hundred eighty-nine thousand, nine hundred sixty-four".