66033321 has 12 divisors (see below), whose sum is σ = 93529392. Its totient is φ = 41432128.

The previous prime is 66033311. The next prime is 66033343. The reversal of 66033321 is 12333066.

It is not a de Polignac number, because 66033321 - 2¹⁵ = 66000553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66033291 and 66033300.

It is not an unprimeable number, because it can be changed into a prime (66033311) 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 11 ways as a sum of consecutive naturals, for example, 37215 + ... + 38948.

It is an arithmetic number, because the mean of its divisors is an integer number (7794116).

Almost surely, 2^66033321 is an apocalyptic number.

It is an amenable number.

66033321 is a deficient number, since it is larger than the sum of its proper divisors (27496071).

66033321 is a wasteful number, since it uses less digits than its factorization.

66033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76200 (or 76183 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 66033321 is about 8126.0889116475. The cubic root of 66033321 is about 404.1919997914.

Adding to 66033321 its reverse (12333066), we get a palindrome (78366387).

The spelling of 66033321 in words is "sixty-six million, thirty-three thousand, three hundred twenty-one".