133023666 has 64 divisors (see below), whose sum is σ = 284046336. Its totient is φ = 41472000.

The previous prime is 133023647. The next prime is 133023703. The reversal of 133023666 is 666320331.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1317016 + ... + 1317116.

It is an arithmetic number, because the mean of its divisors is an integer number (4438224).

Almost surely, 2^133023666 is an apocalyptic number.

133023666 is an abundant number, since it is smaller than the sum of its proper divisors (151022670).

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

133023666 is a wasteful number, since it uses less digits than its factorization.

133023666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307.

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 133023666 is about 11533.5886002579. The cubic root of 133023666 is about 510.4771466844.

Adding to 133023666 its reverse (666320331), we get a palindrome (799343997).

The spelling of 133023666 in words is "one hundred thirty-three million, twenty-three thousand, six hundred sixty-six".