133025666 has 4 divisors (see below), whose sum is σ = 199538502. Its totient is φ = 66512832.

The previous prime is 133025657. The next prime is 133025701. The reversal of 133025666 is 666520331.

133025666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666520331 = 37 ⋅18014063.

It can be written as a sum of positive squares in only one way, i.e., 127125625 + 5900041 = 11275^2 + 2429^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33256415 + ... + 33256418.

Almost surely, 2^133025666 is an apocalyptic number.

133025666 is a deficient number, since it is larger than the sum of its proper divisors (66512836).

133025666 is an equidigital number, since it uses as much as digits as its factorization.

133025666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66512835.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 133025666 is about 11533.6753032154. The cubic root of 133025666 is about 510.4797049991.

Adding to 133025666 its reverse (666520331), we get a palindrome (799545997).

The spelling of 133025666 in words is "one hundred thirty-three million, twenty-five thousand, six hundred sixty-six".