133665066 has 32 divisors (see below), whose sum is σ = 300710400. Its totient is φ = 44553564.

The previous prime is 133665023. The next prime is 133665071. The reversal of 133665066 is 660566331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133665066.

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, 10906 + ... + 19653.

It is an arithmetic number, because the mean of its divisors is an integer number (9397200).

Almost surely, 2^133665066 is an apocalyptic number.

133665066 is an abundant number, since it is smaller than the sum of its proper divisors (167045334).

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

133665066 is an frugal number, since it uses more digits than its factorization.

133665066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30582 (or 30564 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 133665066 is about 11561.3609060525. The cubic root of 133665066 is about 511.2962871592.

The spelling of 133665066 in words is "one hundred thirty-three million, six hundred sixty-five thousand, sixty-six".