665612060 has 48 divisors (see below), whose sum is σ = 1461015360. Its totient is φ = 254392320.

The previous prime is 665612039. The next prime is 665612063. The reversal of 665612060 is 60216566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665612063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50345 + ... + 62175.

It is an arithmetic number, because the mean of its divisors is an integer number (30437820).

Almost surely, 2^665612060 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 665612060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730507680).

665612060 is an abundant number, since it is smaller than the sum of its proper divisors (795403300).

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

665612060 is a wasteful number, since it uses less digits than its factorization.

665612060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11966 (or 11964 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 665612060 is about 25799.4585214496. The cubic root of 665612060 is about 873.1195797336.

The spelling of 665612060 in words is "six hundred sixty-five million, six hundred twelve thousand, sixty".