133661027 has 4 divisors (see below), whose sum is σ = 139472400. Its totient is φ = 127849656.

The previous prime is 133660999. The next prime is 133661039. The reversal of 133661027 is 720166331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720166331 = 59 ⋅12206209.

It is a cyclic number.

It is not a de Polignac number, because 133661027 - 2⁶ = 133660963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133631027) 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, 2905652 + ... + 2905697.

It is an arithmetic number, because the mean of its divisors is an integer number (34868100).

Almost surely, 2^133661027 is an apocalyptic number.

133661027 is a deficient number, since it is larger than the sum of its proper divisors (5811373).

133661027 is an equidigital number, since it uses as much as digits as its factorization.

133661027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811372.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 133661027 is about 11561.1862280650. The cubic root of 133661027 is about 511.2911371063.

The spelling of 133661027 in words is "one hundred thirty-three million, six hundred sixty-one thousand, twenty-seven".