133966 has 12 divisors (see below), whose sum is σ = 233928. Its totient is φ = 57372.

The previous prime is 133963. The next prime is 133967. The reversal of 133966 is 669331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586 + ... + 781.

It is an arithmetic number, because the mean of its divisors is an integer number (19494).

2¹³³⁹⁶⁶ is an apocalyptic number.

133966 is the 196-th nonagonal number.

133966 is a deficient number, since it is larger than the sum of its proper divisors (99962).

133966 is a wasteful number, since it uses less digits than its factorization.

133966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1376 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 133966 is about 366.0136609472. The cubic root of 133966 is about 51.1679710976.

The spelling of 133966 in words is "one hundred thirty-three thousand, nine hundred sixty-six".