194464809666 has 32 divisors (see below), whose sum is σ = 433681934400. Its totient is φ = 64590916320.

The previous prime is 194464809653. The next prime is 194464809713. The reversal of 194464809666 is 666908464491.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6392656 + ... + 6423003.

It is an arithmetic number, because the mean of its divisors is an integer number (13552560450).

Almost surely, 2^194464809666 is an apocalyptic number.

194464809666 is an abundant number, since it is smaller than the sum of its proper divisors (239217124734).

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

194464809666 is a wasteful number, since it uses less digits than its factorization.

194464809666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815951 (or 12815945 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 194464809666 in words is "one hundred ninety-four billion, four hundred sixty-four million, eight hundred nine thousand, six hundred sixty-six".