666332016 has 80 divisors (see below), whose sum is σ = 1970373888. Its totient is φ = 190080000.

The previous prime is 666331997. The next prime is 666332083. The reversal of 666332016 is 610233666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294891 + ... + 297141.

Almost surely, 2^666332016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666332016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985186944).

666332016 is an abundant number, since it is smaller than the sum of its proper divisors (1304041872).

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

666332016 is a wasteful number, since it uses less digits than its factorization.

666332016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150 (or 3144 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 666332016 is about 25813.4076789563. The cubic root of 666332016 is about 873.4342681287.

The spelling of 666332016 in words is "six hundred sixty-six million, three hundred thirty-two thousand, sixteen".