66530033 has 4 divisors (see below), whose sum is σ = 68328180. Its totient is φ = 64731888.

The previous prime is 66530029. The next prime is 66530041. The reversal of 66530033 is 33003566.

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 26296384 + 40233649 = 5128^2 + 6343^2 .

It is a cyclic number.

It is not a de Polignac number, because 66530033 - 2² = 66530029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66529984 and 66530011.

It is not an unprimeable number, because it can be changed into a prime (66538033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899018 + ... + 899091.

It is an arithmetic number, because the mean of its divisors is an integer number (17082045).

Almost surely, 2^66530033 is an apocalyptic number.

It is an amenable number.

66530033 is a deficient number, since it is larger than the sum of its proper divisors (1798147).

66530033 is a wasteful number, since it uses less digits than its factorization.

66530033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798146.

The product of its (nonzero) digits is 4860, while the sum is 26.

The square root of 66530033 is about 8156.5944486654. The cubic root of 66530033 is about 405.2029323905.

Adding to 66530033 its reverse (33003566), we get a palindrome (99533599).

The spelling of 66530033 in words is "sixty-six million, five hundred thirty thousand, thirty-three".