665301616 has 30 divisors (see below), whose sum is σ = 1499476200. Its totient is φ = 285128928.

The previous prime is 665301607. The next prime is 665301631. The reversal of 665301616 is 616103566.

It is a super-2 number, since 2×665301616² = 885252480504422912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 423516 + ... + 425083.

It is an arithmetic number, because the mean of its divisors is an integer number (49982540).

Almost surely, 2^665301616 is an apocalyptic number.

It is an amenable number.

665301616 is an abundant number, since it is smaller than the sum of its proper divisors (834174584).

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

665301616 is a wasteful number, since it uses less digits than its factorization.

665301616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848621 (or 848608 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 665301616 is about 25793.4413368980. The cubic root of 665301616 is about 872.9838165254.

The spelling of 665301616 in words is "six hundred sixty-five million, three hundred one thousand, six hundred sixteen".