133447668 has 24 divisors (see below), whose sum is σ = 314879040. Its totient is φ = 43982400.

The previous prime is 133447631. The next prime is 133447673. The reversal of 133447668 is 866744331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61408 + ... + 63543.

It is an arithmetic number, because the mean of its divisors is an integer number (13119960).

Almost surely, 2^133447668 is an apocalyptic number.

It is an amenable number.

133447668 is an abundant number, since it is smaller than the sum of its proper divisors (181431372).

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

133447668 is a wasteful number, since it uses less digits than its factorization.

133447668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125047 (or 125045 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 133447668 is about 11551.9551591928. The cubic root of 133447668 is about 511.0189394318.

It can be divided in two parts, 13344 and 7668, that added together give a palindrome (21012).

The spelling of 133447668 in words is "one hundred thirty-three million, four hundred forty-seven thousand, six hundred sixty-eight".