66623033 has 2 divisors, whose sum is σ = 66623034. Its totient is φ = 66623032.

The previous prime is 66623027. The next prime is 66623047. The reversal of 66623033 is 33032666.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48330304 + 18292729 = 6952^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 66623033 - 2¹⁶ = 66557497 is a prime.

It is a super-2 number, since 2×66623033² = 8877257052238178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66622987 and 66623005.

It is not a weakly prime, because it can be changed into another prime (66623003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311516 + 33311517.

It is an arithmetic number, because the mean of its divisors is an integer number (33311517).

Almost surely, 2^66623033 is an apocalyptic number.

It is an amenable number.

66623033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66623033 is an equidigital number, since it uses as much as digits as its factorization.

66623033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 66623033 is about 8162.2933664504. The cubic root of 66623033 is about 405.3916508066.

Adding to 66623033 its reverse (33032666), we get a palindrome (99655699).

The spelling of 66623033 in words is "sixty-six million, six hundred twenty-three thousand, thirty-three".