66603312 has 60 divisors (see below), whose sum is σ = 186946864. Its totient is φ = 22135680.

The previous prime is 66603307. The next prime is 66603319. The reversal of 66603312 is 21330666.

It is not an unprimeable number, because it can be changed into a prime (66603319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90498 + ... + 91230.

Almost surely, 2^66603312 is an apocalyptic number.

It is an amenable number.

66603312 is an abundant number, since it is smaller than the sum of its proper divisors (120343552).

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

66603312 is a wasteful number, since it uses less digits than its factorization.

66603312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 66603312 is about 8161.0852219542. The cubic root of 66603312 is about 405.3516470353.

Adding to 66603312 its reverse (21330666), we get a palindrome (87933978).

The spelling of 66603312 in words is "sixty-six million, six hundred three thousand, three hundred twelve".