66723233 has 2 divisors, whose sum is σ = 66723234. Its totient is φ = 66723232.

The previous prime is 66723179. The next prime is 66723257. The reversal of 66723233 is 33232766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54937744 + 11785489 = 7412^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 66723233 - 2²⁰ = 65674657 is a prime.

It is equal to p_3936443 and since 66723233 and 3936443 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66723233.

It is not a weakly prime, because it can be changed into another prime (66743233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33361616 + 33361617.

It is an arithmetic number, because the mean of its divisors is an integer number (33361617).

Almost surely, 2^66723233 is an apocalyptic number.

It is an amenable number.

66723233 is a deficient number, since it is larger than the sum of its proper divisors (1).

66723233 is an equidigital number, since it uses as much as digits as its factorization.

66723233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 32.

The square root of 66723233 is about 8168.4290411315. The cubic root of 66723233 is about 405.5947832395.

Adding to 66723233 its reverse (33232766), we get a palindrome (99955999).

The spelling of 66723233 in words is "sixty-six million, seven hundred twenty-three thousand, two hundred thirty-three".