66013533 has 24 divisors (see below), whose sum is σ = 101619648. Its totient is φ = 41150592.

The previous prime is 66013531. The next prime is 66013537. The reversal of 66013533 is 33531066.

66013533 is a `hidden beast` number, since 6 + 601 + 3 + 53 + 3 = 666.

It is not a de Polignac number, because 66013533 - 2¹ = 66013531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66013497 and 66013506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013531) 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 23 ways as a sum of consecutive naturals, for example, 23616 + ... + 26262.

It is an arithmetic number, because the mean of its divisors is an integer number (4234152).

Almost surely, 2^66013533 is an apocalyptic number.

It is an amenable number.

66013533 is a deficient number, since it is larger than the sum of its proper divisors (35606115).

66013533 is a wasteful number, since it uses less digits than its factorization.

66013533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833 (or 2830 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 66013533 is about 8124.8712605185. The cubic root of 66013533 is about 404.1516214378.

Adding to 66013533 its reverse (33531066), we get a palindrome (99544599).

The spelling of 66013533 in words is "sixty-six million, thirteen thousand, five hundred thirty-three".