133997166 has 20 divisors (see below), whose sum is σ = 300253272. Its totient is φ = 44665668.

The previous prime is 133997161. The next prime is 133997167. The reversal of 133997166 is 661799331.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133997161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 413410 + ... + 413733.

Almost surely, 2^133997166 is an apocalyptic number.

133997166 is an abundant number, since it is smaller than the sum of its proper divisors (166256106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133997166 is an equidigital number, since it uses as much as digits as its factorization.

133997166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827157 (or 827148 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 133997166 is about 11575.7144919871. The cubic root of 133997166 is about 511.7193871460.

The spelling of 133997166 in words is "one hundred thirty-three million, nine hundred ninety-seven thousand, one hundred sixty-six".