133015666 has 32 divisors (see below), whose sum is σ = 235492992. Its totient is φ = 55157760.

The previous prime is 133015657. The next prime is 133015679. The reversal of 133015666 is 666510331.

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, 108690 + ... + 109906.

It is an arithmetic number, because the mean of its divisors is an integer number (7359156).

Almost surely, 2^133015666 is an apocalyptic number.

133015666 is a deficient number, since it is larger than the sum of its proper divisors (102477326).

133015666 is a wasteful number, since it uses less digits than its factorization.

133015666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474.

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

The square root of 133015666 is about 11533.2417819102. The cubic root of 133015666 is about 510.4669131694.

Adding to 133015666 its reverse (666510331), we get a palindrome (799525997).

The spelling of 133015666 in words is "one hundred thirty-three million, fifteen thousand, six hundred sixty-six".