133145666 has 16 divisors (see below), whose sum is σ = 220662144. Its totient is φ = 59932224.

The previous prime is 133145659. The next prime is 133145687. The reversal of 133145666 is 666541331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84350 + ... + 85913.

It is an arithmetic number, because the mean of its divisors is an integer number (13791384).

Almost surely, 2^133145666 is an apocalyptic number.

133145666 is a deficient number, since it is larger than the sum of its proper divisors (87516478).

133145666 is a wasteful number, since it uses less digits than its factorization.

133145666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170305.

The product of its digits is 38880, while the sum is 35.

The square root of 133145666 is about 11538.8762884433. The cubic root of 133145666 is about 510.6331569754.

Adding to 133145666 its reverse (666541331), we get a palindrome (799686997).

The spelling of 133145666 in words is "one hundred thirty-three million, one hundred forty-five thousand, six hundred sixty-six".