133475666 has 4 divisors (see below), whose sum is σ = 200213502. Its totient is φ = 66737832.

The previous prime is 133475659. The next prime is 133475689. The reversal of 133475666 is 666574331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666574331 = 10631 ⋅62701.

It can be written as a sum of positive squares in only one way, i.e., 69139225 + 64336441 = 8315^2 + 8021^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368915 + ... + 33368918.

Almost surely, 2^133475666 is an apocalyptic number.

133475666 is a deficient number, since it is larger than the sum of its proper divisors (66737836).

133475666 is an equidigital number, since it uses as much as digits as its factorization.

133475666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66737835.

The product of its digits is 272160, while the sum is 41.

The square root of 133475666 is about 11553.1669251336. The cubic root of 133475666 is about 511.0546750576.

The spelling of 133475666 in words is "one hundred thirty-three million, four hundred seventy-five thousand, six hundred sixty-six".