665508716 has 12 divisors (see below), whose sum is σ = 1165540488. Its totient is φ = 332497152.

The previous prime is 665508637. The next prime is 665508797. The reversal of 665508716 is 617805566.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58421 + ... + 68876.

It is an arithmetic number, because the mean of its divisors is an integer number (97128374).

Almost surely, 2^665508716 is an apocalyptic number.

It is an amenable number.

665508716 is a deficient number, since it is larger than the sum of its proper divisors (500031772).

665508716 is a wasteful number, since it uses less digits than its factorization.

665508716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128608 (or 128606 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 665508716 is about 25797.4556109706. The cubic root of 665508716 is about 873.0743900776.

The spelling of 665508716 in words is "six hundred sixty-five million, five hundred eight thousand, seven hundred sixteen".