133326666 has 96 divisors (see below), whose sum is σ = 326514240. Its totient is φ = 38976000.

The previous prime is 133326647. The next prime is 133326701. The reversal of 133326666 is 666623331.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 133326666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1179826 + ... + 1179938.

It is an arithmetic number, because the mean of its divisors is an integer number (3401190).

Almost surely, 2^133326666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133326666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163257120).

133326666 is an abundant number, since it is smaller than the sum of its proper divisors (193187574).

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

133326666 is a wasteful number, since it uses less digits than its factorization.

133326666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 289 counting only the distinct ones).

The product of its digits is 69984, while the sum is 36.

The square root of 133326666 is about 11546.7166761812. The cubic root of 133326666 is about 510.8644393864.

Adding to 133326666 its reverse (666623331), we get a palindrome (799949997).

The spelling of 133326666 in words is "one hundred thirty-three million, three hundred twenty-six thousand, six hundred sixty-six".