660532133 has 4 divisors (see below), whose sum is σ = 660586080. Its totient is φ = 660478188.

The previous prime is 660532129. The next prime is 660532157. The reversal of 660532133 is 331235066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 331235066 = 2 ⋅165617533.

It is a cyclic number.

It is not a de Polignac number, because 660532133 - 2² = 660532129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660532096 and 660532105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660531133) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 36366.

It is an arithmetic number, because the mean of its divisors is an integer number (165146520).

Almost surely, 2^660532133 is an apocalyptic number.

It is an amenable number.

660532133 is a deficient number, since it is larger than the sum of its proper divisors (53947).

660532133 is a wasteful number, since it uses less digits than its factorization.

660532133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53946.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 660532133 is about 25700.8196950992. The cubic root of 660532133 is about 870.8926993209.

Adding to 660532133 its reverse (331235066), we get a palindrome (991767199).

It can be divided in two parts, 66053 and 2133, that added together give a palindrome (68186).

The spelling of 660532133 in words is "six hundred sixty million, five hundred thirty-two thousand, one hundred thirty-three".