665061016 has 16 divisors (see below), whose sum is σ = 1253453400. Its totient is φ = 330806784.

The previous prime is 665060999. The next prime is 665061017. The reversal of 665061016 is 610160566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665061017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213826 + ... + 216913.

Almost surely, 2^665061016 is an apocalyptic number.

It is an amenable number.

665061016 is a deficient number, since it is larger than the sum of its proper divisors (588392384).

665061016 is a wasteful number, since it uses less digits than its factorization.

665061016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430938 (or 430934 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 665061016 is about 25788.7769388158. The cubic root of 665061016 is about 872.8785684064.

The spelling of 665061016 in words is "six hundred sixty-five million, sixty-one thousand, sixteen".