133105666 has 8 divisors (see below), whose sum is σ = 199713600. Its totient is φ = 66534468.

The previous prime is 133105663. The next prime is 133105667. The reversal of 133105666 is 666501331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (133105663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3235 + ... + 16633.

It is an arithmetic number, because the mean of its divisors is an integer number (24964200).

Almost surely, 2^133105666 is an apocalyptic number.

133105666 is a deficient number, since it is larger than the sum of its proper divisors (66607934).

133105666 is a wasteful number, since it uses less digits than its factorization.

133105666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18368.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 133105666 is about 11537.1428872143. The cubic root of 133105666 is about 510.5820165649.

Adding to 133105666 its reverse (666501331), we get a palindrome (799606997).

The spelling of 133105666 in words is "one hundred thirty-three million, one hundred five thousand, six hundred sixty-six".