665127873312 has 48 divisors (see below), whose sum is σ = 1995383621952. Its totient is φ = 190036535040.

The previous prime is 665127873239. The next prime is 665127873317. The reversal of 665127873312 is 213378721566.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (665127873317) 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, 494886139 + ... + 494887482.

It is an arithmetic number, because the mean of its divisors is an integer number (41570492124).

Almost surely, 2^665127873312 is an apocalyptic number.

It is an amenable number.

665127873312 is an abundant number, since it is smaller than the sum of its proper divisors (1330255748640).

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

665127873312 is a wasteful number, since it uses less digits than its factorization.

665127873312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989773641 (or 989773633 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 665127873312 in words is "six hundred sixty-five billion, one hundred twenty-seven million, eight hundred seventy-three thousand, three hundred twelve".