665556116 has 24 divisors (see below), whose sum is σ = 1212708840. Its totient is φ = 319334400.

The previous prime is 665556113. The next prime is 665556131. The reversal of 665556116 is 611655566.

665556116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 122500 + 665433616 = 350^2 + 25796^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665556113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23261 + ... + 43268.

It is an arithmetic number, because the mean of its divisors is an integer number (50529535).

Almost surely, 2^665556116 is an apocalyptic number.

It is an amenable number.

665556116 is a deficient number, since it is larger than the sum of its proper divisors (547152724).

665556116 is a wasteful number, since it uses less digits than its factorization.

665556116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66635 (or 66633 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

The square root of 665556116 is about 25798.3742898656. The cubic root of 665556116 is about 873.0951174513.

The spelling of 665556116 in words is "six hundred sixty-five million, five hundred fifty-six thousand, one hundred sixteen".