133666572 has 48 divisors (see below), whose sum is σ = 337094912. Its totient is φ = 40979520.

The previous prime is 133666571. The next prime is 133666573. The reversal of 133666572 is 275666331.

133666572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (133666571) and next prime (133666573).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 133666572.

It is not an unprimeable number, because it can be changed into a prime (133666571) 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 15 ways as a sum of consecutive naturals, for example, 46497 + ... + 49287.

Almost surely, 2^133666572 is an apocalyptic number.

133666572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133666572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168547456).

133666572 is an abundant number, since it is smaller than the sum of its proper divisors (203428340).

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

133666572 is a wasteful number, since it uses less digits than its factorization.

133666572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118 (or 3116 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 133666572 is about 11561.4260366098. The cubic root of 133666572 is about 511.2982074050.

The spelling of 133666572 in words is "one hundred thirty-three million, six hundred sixty-six thousand, five hundred seventy-two".