66380233 has 4 divisors (see below), whose sum is σ = 66903040. Its totient is φ = 65857428.

The previous prime is 66380219. The next prime is 66380239. The reversal of 66380233 is 33208366.

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.

It is a cyclic number.

It is not a de Polignac number, because 66380233 - 2¹³ = 66372041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66380195 and 66380204.

It is not an unprimeable number, because it can be changed into a prime (66380239) 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, 261213 + ... + 261466.

It is an arithmetic number, because the mean of its divisors is an integer number (16725760).

Almost surely, 2^66380233 is an apocalyptic number.

It is an amenable number.

66380233 is a deficient number, since it is larger than the sum of its proper divisors (522807).

66380233 is a wasteful number, since it uses less digits than its factorization.

66380233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522806.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66380233 is about 8147.4065198688. The cubic root of 66380233 is about 404.8985835582.

Adding to 66380233 its reverse (33208366), we get a palindrome (99588599).

The spelling of 66380233 in words is "sixty-six million, three hundred eighty thousand, two hundred thirty-three".