665945116 has 12 divisors (see below), whose sum is σ = 1176943320. Its totient is φ = 329675600.

The previous prime is 665945107. The next prime is 665945177. The reversal of 665945116 is 611549566.

It is a congruent number.

It is an unprimeable number.

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, 823786 + ... + 824593.

It is an arithmetic number, because the mean of its divisors is an integer number (98078610).

Almost surely, 2^665945116 is an apocalyptic number.

It is an amenable number.

665945116 is a deficient number, since it is larger than the sum of its proper divisors (510998204).

665945116 is a wasteful number, since it uses less digits than its factorization.

665945116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648484 (or 1648482 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 665945116 is about 25805.9124233188. The cubic root of 665945116 is about 873.2651846803.

The spelling of 665945116 in words is "six hundred sixty-five million, nine hundred forty-five thousand, one hundred sixteen".