133766 has 4 divisors (see below), whose sum is σ = 200652. Its totient is φ = 66882.

The previous prime is 133733. The next prime is 133769. The reversal of 133766 is 667331.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33440 + ... + 33443.

It is an arithmetic number, because the mean of its divisors is an integer number (50163).

2¹³³⁷⁶⁶ is an apocalyptic number.

133766 is a deficient number, since it is larger than the sum of its proper divisors (66886).

133766 is an equidigital number, since it uses as much as digits as its factorization.

133766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66885.

The product of its digits is 2268, while the sum is 26.

The square root of 133766 is about 365.7403450537. The cubic root of 133766 is about 51.1424952528.

The spelling of 133766 in words is "one hundred thirty-three thousand, seven hundred sixty-six".