665641163308 has 24 divisors (see below), whose sum is σ = 1270849925520. Its totient is φ = 302545014720.

The previous prime is 665641163207. The next prime is 665641163311. The reversal of 665641163308 is 803361146566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236310 + ... + 1177762.

It is an arithmetic number, because the mean of its divisors is an integer number (52952080230).

Almost surely, 2^665641163308 is an apocalyptic number.

It is an amenable number.

665641163308 is a deficient number, since it is larger than the sum of its proper divisors (605208762212).

665641163308 is a wasteful number, since it uses less digits than its factorization.

665641163308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957537 (or 957535 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 665641163308 in words is "six hundred sixty-five billion, six hundred forty-one million, one hundred sixty-three thousand, three hundred eight".