66136533 has 4 divisors (see below), whose sum is σ = 88182048. Its totient is φ = 44091020.

The previous prime is 66136531. The next prime is 66136541. The reversal of 66136533 is 33563166.

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.

It is a cyclic number.

It is not a de Polignac number, because 66136533 - 2¹ = 66136531 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66136494 and 66136503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66136531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11022753 + ... + 11022758.

It is an arithmetic number, because the mean of its divisors is an integer number (22045512).

Almost surely, 2^66136533 is an apocalyptic number.

It is an amenable number.

66136533 is a deficient number, since it is larger than the sum of its proper divisors (22045515).

66136533 is a wasteful number, since it uses less digits than its factorization.

66136533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22045514.

The product of its digits is 29160, while the sum is 33.

The square root of 66136533 is about 8132.4370885977. The cubic root of 66136533 is about 404.4024781161.

Adding to 66136533 its reverse (33563166), we get a palindrome (99699699).

The spelling of 66136533 in words is "sixty-six million, one hundred thirty-six thousand, five hundred thirty-three".