133263666 has 24 divisors (see below), whose sum is σ = 291545280. Its totient is φ = 43989336.

The previous prime is 133263661. The next prime is 133263667. The reversal of 133263666 is 666362331.

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 133263666.

It is not an unprimeable number, because it can be changed into a prime (133263661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34086 + ... + 37793.

It is an arithmetic number, because the mean of its divisors is an integer number (12147720).

Almost surely, 2^133263666 is an apocalyptic number.

133263666 is an abundant number, since it is smaller than the sum of its proper divisors (158281614).

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

133263666 is a wasteful number, since it uses less digits than its factorization.

133263666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71990 (or 71987 counting only the distinct ones).

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

The square root of 133263666 is about 11543.9883056074. The cubic root of 133263666 is about 510.7839615363.

The spelling of 133263666 in words is "one hundred thirty-three million, two hundred sixty-three thousand, six hundred sixty-six".