666533322 has 96 divisors (see below), whose sum is σ = 1790006400. Its totient is φ = 174545280.

The previous prime is 666533321. The next prime is 666533323. The reversal of 666533322 is 223335666.

It is an interprime number because it is at equal distance from previous prime (666533321) and next prime (666533323).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (666533321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242697 + ... + 245427.

It is an arithmetic number, because the mean of its divisors is an integer number (18645900).

Almost surely, 2^666533322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666533322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895003200).

666533322 is an abundant number, since it is smaller than the sum of its proper divisors (1123473078).

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

666533322 is a wasteful number, since it uses less digits than its factorization.

666533322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908 (or 2905 counting only the distinct ones).

The product of its digits is 116640, while the sum is 36.

The square root of 666533322 is about 25817.3066372153. The cubic root of 666533322 is about 873.5222172047.

Adding to 666533322 its reverse (223335666), we get a palindrome (889868988).

The spelling of 666533322 in words is "six hundred sixty-six million, five hundred thirty-three thousand, three hundred twenty-two".