666352752 has 160 divisors (see below), whose sum is σ = 1908836160. Its totient is φ = 199065600.

The previous prime is 666352747. The next prime is 666352759. The reversal of 666352752 is 257253666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666352759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6113274 + ... + 6113382.

It is an arithmetic number, because the mean of its divisors is an integer number (11930226).

Almost surely, 2^666352752 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 666352752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954418080).

666352752 is an abundant number, since it is smaller than the sum of its proper divisors (1242483408).

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

666352752 is a wasteful number, since it uses less digits than its factorization.

666352752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 325 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 666352752 is about 25813.8093275673. The cubic root of 666352752 is about 873.4433283493.

The spelling of 666352752 in words is "six hundred sixty-six million, three hundred fifty-two thousand, seven hundred fifty-two".