66852223 has 2 divisors, whose sum is σ = 66852224. Its totient is φ = 66852222.

The previous prime is 66852197. The next prime is 66852257. The reversal of 66852223 is 32225866.

It is an a-pointer prime, because the next prime (66852257) can be obtained adding 66852223 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66852223 - 2²⁵ = 33297791 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66852293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33426111 + 33426112.

It is an arithmetic number, because the mean of its divisors is an integer number (33426112).

Almost surely, 2^66852223 is an apocalyptic number.

66852223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66852223 is an equidigital number, since it uses as much as digits as its factorization.

66852223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 66852223 is about 8176.3208718836. The cubic root of 66852223 is about 405.8559815819.

The spelling of 66852223 in words is "sixty-six million, eight hundred fifty-two thousand, two hundred twenty-three".