665071116 has 12 divisors (see below), whose sum is σ = 1551832632. Its totient is φ = 221690368.

The previous prime is 665071111. The next prime is 665071157. The reversal of 665071116 is 611170566.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (665071111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27711285 + ... + 27711308.

It is an arithmetic number, because the mean of its divisors is an integer number (129319386).

Almost surely, 2^665071116 is an apocalyptic number.

It is an amenable number.

665071116 is an abundant number, since it is smaller than the sum of its proper divisors (886761516).

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

665071116 is a wasteful number, since it uses less digits than its factorization.

665071116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55422600 (or 55422598 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 665071116 is about 25788.9727596894. The cubic root of 665071116 is about 872.8829870631.

The spelling of 665071116 in words is "six hundred sixty-five million, seventy-one thousand, one hundred sixteen".