665611316 has 24 divisors (see below), whose sum is σ = 1176752640. Its totient is φ = 329414400.

The previous prime is 665611301. The next prime is 665611351. The reversal of 665611316 is 613116566.

665611316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159140 + ... + 163268.

It is an arithmetic number, because the mean of its divisors is an integer number (49031360).

Almost surely, 2^665611316 is an apocalyptic number.

It is an amenable number.

665611316 is a deficient number, since it is larger than the sum of its proper divisors (511141324).

665611316 is a wasteful number, since it uses less digits than its factorization.

665611316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535 (or 4533 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 665611316 is about 25799.4441025383. Note that the first 3 decimals coincide. The cubic root of 665611316 is about 873.1192544184.

The spelling of 665611316 in words is "six hundred sixty-five million, six hundred eleven thousand, three hundred sixteen".