665986116 has 24 divisors (see below), whose sum is σ = 1573640320. Its totient is φ = 219184992.

The previous prime is 665986109. The next prime is 665986117. The reversal of 665986116 is 611689566.

It is not an unprimeable number, because it can be changed into a prime (665986117) 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, 350311 + ... + 352206.

Almost surely, 2^665986116 is an apocalyptic number.

It is an amenable number.

665986116 is an abundant number, since it is smaller than the sum of its proper divisors (907654204).

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

665986116 is a wasteful number, since it uses less digits than its factorization.

665986116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702603 (or 702601 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 665986116 is about 25806.7068026899. The cubic root of 665986116 is about 873.2831056455.

The spelling of 665986116 in words is "six hundred sixty-five million, nine hundred eighty-six thousand, one hundred sixteen".