665110061 has 16 divisors (see below), whose sum is σ = 829813248. Its totient is φ = 517902000.

The previous prime is 665110051. The next prime is 665110079. The reversal of 665110061 is 160011566.

665110061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665110061 - 2⁶ = 665109997 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 665110061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665110001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170786 + ... + 174636.

It is an arithmetic number, because the mean of its divisors is an integer number (51863328).

Almost surely, 2^665110061 is an apocalyptic number.

It is an amenable number.

665110061 is a deficient number, since it is larger than the sum of its proper divisors (164703187).

665110061 is a wasteful number, since it uses less digits than its factorization.

665110061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6112.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 665110061 is about 25789.7278194245. The cubic root of 665110061 is about 872.9000247220.

The spelling of 665110061 in words is "six hundred sixty-five million, one hundred ten thousand, sixty-one".