665083960 has 64 divisors (see below), whose sum is σ = 1539427680. Its totient is φ = 258447360.

The previous prime is 665083949. The next prime is 665083963. The reversal of 665083960 is 69380566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665083963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463404 + ... + 464836.

Almost surely, 2^665083960 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 665083960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769713840).

665083960 is an abundant number, since it is smaller than the sum of its proper divisors (874343720).

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

665083960 is a wasteful number, since it uses less digits than its factorization.

665083960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 665083960 is about 25789.2217796505. The cubic root of 665083960 is about 872.8886061298. Note that the first 3 decimals are identical.

The spelling of 665083960 in words is "six hundred sixty-five million, eighty-three thousand, nine hundred sixty".