133166865228 has 12 divisors (see below), whose sum is σ = 310722685560. Its totient is φ = 44388955072.

The previous prime is 133166865193. The next prime is 133166865233. The reversal of 133166865228 is 822568661331.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548619373 + ... + 5548619396.

It is an arithmetic number, because the mean of its divisors is an integer number (25893557130).

Almost surely, 2^133166865228 is an apocalyptic number.

It is an amenable number.

133166865228 is an abundant number, since it is smaller than the sum of its proper divisors (177555820332).

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

133166865228 is a wasteful number, since it uses less digits than its factorization.

133166865228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097238776 (or 11097238774 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The spelling of 133166865228 in words is "one hundred thirty-three billion, one hundred sixty-six million, eight hundred sixty-five thousand, two hundred twenty-eight".