665048670 has 192 divisors, whose sum is σ = 2002916160. Its totient is φ = 139898880.

The previous prime is 665048669. The next prime is 665048689. The reversal of 665048670 is 76840566.

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 95 ways as a sum of consecutive naturals, for example, 801816 + ... + 802644.

It is an arithmetic number, because the mean of its divisors is an integer number (10431855).

Almost surely, 2^665048670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665048670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001458080).

665048670 is an abundant number, since it is smaller than the sum of its proper divisors (1337867490).

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

665048670 is a wasteful number, since it uses less digits than its factorization.

665048670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 665048670 is about 25788.5375700135. The cubic root of 665048670 is about 872.8731670847.

The spelling of 665048670 in words is "six hundred sixty-five million, forty-eight thousand, six hundred seventy".