665066052 has 120 divisors (see below), whose sum is σ = 2011496256. Its totient is φ = 187676352.

The previous prime is 665066041. The next prime is 665066069. The reversal of 665066052 is 250660566.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 665065998 and 665066016.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 186478 + ... + 190010.

Almost surely, 2^665066052 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 665066052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005748128).

665066052 is an abundant number, since it is smaller than the sum of its proper divisors (1346430204).

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

665066052 is a wasteful number, since it uses less digits than its factorization.

665066052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 665066052 is about 25788.8745780036. The cubic root of 665066052 is about 872.8807716155.

The spelling of 665066052 in words is "six hundred sixty-five million, sixty-six thousand, fifty-two".