66033320 has 32 divisors (see below), whose sum is σ = 148818600. Its totient is φ = 26370048.

The previous prime is 66033311. The next prime is 66033343. The reversal of 66033320 is 2333066.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33154564 + 32878756 = 5758^2 + 5734^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36272 + ... + 38048.

Almost surely, 2^66033320 is an apocalyptic number.

It is an amenable number.

66033320 is an abundant number, since it is smaller than the sum of its proper divisors (82785280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66033320 is a wasteful number, since it uses less digits than its factorization.

66033320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2713 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 66033320 is about 8126.0888501173. The cubic root of 66033320 is about 404.1919977510.

Adding to 66033320 its reverse (2333066), we get a palindrome (68366386).

The spelling of 66033320 in words is "sixty-six million, thirty-three thousand, three hundred twenty".