66552133 has 12 divisors (see below), whose sum is σ = 71781984. Its totient is φ = 61584600.

The previous prime is 66552131. The next prime is 66552163. The reversal of 66552133 is 33125566.

It is not a de Polignac number, because 66552133 - 2¹ = 66552131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66552095 and 66552104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66552131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20598 + ... + 23608.

It is an arithmetic number, because the mean of its divisors is an integer number (5981832).

Almost surely, 2^66552133 is an apocalyptic number.

It is an amenable number.

66552133 is a deficient number, since it is larger than the sum of its proper divisors (5229851).

66552133 is a wasteful number, since it uses less digits than its factorization.

66552133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3065 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 66552133 is about 8157.9490682401. The cubic root of 66552133 is about 405.2477943024.

Adding to 66552133 its reverse (33125566), we get a palindrome (99677699).

The spelling of 66552133 in words is "sixty-six million, five hundred fifty-two thousand, one hundred thirty-three".