66120233 has 4 divisors (see below), whose sum is σ = 66143940. Its totient is φ = 66096528.

The previous prime is 66120227. The next prime is 66120251. The reversal of 66120233 is 33202166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36385024 + 29735209 = 6032^2 + 5453^2 .

It is a cyclic number.

It is not a de Polignac number, because 66120233 - 2²⁴ = 49343017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66120199 and 66120208.

It is not an unprimeable number, because it can be changed into a prime (66120253) 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, 7010 + ... + 13467.

It is an arithmetic number, because the mean of its divisors is an integer number (16535985).

Almost surely, 2^66120233 is an apocalyptic number.

It is an amenable number.

66120233 is a deficient number, since it is larger than the sum of its proper divisors (23707).

66120233 is a wasteful number, since it uses less digits than its factorization.

66120233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23706.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66120233 is about 8131.4348672298. The cubic root of 66120233 is about 404.3692523950.

Adding to 66120233 its reverse (33202166), we get a palindrome (99322399).

The spelling of 66120233 in words is "sixty-six million, one hundred twenty thousand, two hundred thirty-three".