665168232608 has 48 divisors (see below), whose sum is σ = 1430822213856. Its totient is φ = 301878877440.

The previous prime is 665168232527. The next prime is 665168232731. The reversal of 665168232608 is 806232861566.

It is a self number, because there is not a number n which added to its sum of digits gives 665168232608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243091 + ... + 1695762.

It is an arithmetic number, because the mean of its divisors is an integer number (29808796122).

Almost surely, 2^665168232608 is an apocalyptic number.

It is an amenable number.

665168232608 is an abundant number, since it is smaller than the sum of its proper divisors (765653981248).

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

665168232608 is a wasteful number, since it uses less digits than its factorization.

665168232608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939517 (or 2939509 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 665168232608 in words is "six hundred sixty-five billion, one hundred sixty-eight million, two hundred thirty-two thousand, six hundred eight".