133166427 has 4 divisors (see below), whose sum is σ = 177555240. Its totient is φ = 88777616.

The previous prime is 133166417. The next prime is 133166431. The reversal of 133166427 is 724661331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724661331 = 3 ⋅241553777.

It is a cyclic number.

It is not a de Polignac number, because 133166427 - 2⁸ = 133166171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133166417) 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, 22194402 + ... + 22194407.

It is an arithmetic number, because the mean of its divisors is an integer number (44388810).

Almost surely, 2^133166427 is an apocalyptic number.

133166427 is a deficient number, since it is larger than the sum of its proper divisors (44388813).

133166427 is an equidigital number, since it uses as much as digits as its factorization.

133166427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44388812.

The product of its digits is 18144, while the sum is 33.

The square root of 133166427 is about 11539.7758643745. The cubic root of 133166427 is about 510.6596960894.

The spelling of 133166427 in words is "one hundred thirty-three million, one hundred sixty-six thousand, four hundred twenty-seven".