66436133 has 4 divisors (see below), whose sum is σ = 67081248. Its totient is φ = 65791020.

The previous prime is 66436091. The next prime is 66436147. The reversal of 66436133 is 33163466.

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 66436133 - 2²⁰ = 65387557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66436133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66436033) 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, 322403 + ... + 322608.

It is an arithmetic number, because the mean of its divisors is an integer number (16770312).

Almost surely, 2^66436133 is an apocalyptic number.

It is an amenable number.

66436133 is a deficient number, since it is larger than the sum of its proper divisors (645115).

66436133 is a wasteful number, since it uses less digits than its factorization.

66436133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645114.

The product of its digits is 23328, while the sum is 32.

The square root of 66436133 is about 8150.8363374564. The cubic root of 66436133 is about 405.0122091528.

Adding to 66436133 its reverse (33163466), we get a palindrome (99599599).

The spelling of 66436133 in words is "sixty-six million, four hundred thirty-six thousand, one hundred thirty-three".