665477647072 has 24 divisors (see below), whose sum is σ = 1497324706416. Its totient is φ = 285204705792.

The previous prime is 665477647069. The next prime is 665477647123. The reversal of 665477647072 is 270746774566.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 665477647072.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1485440953 + ... + 1485441400.

It is an arithmetic number, because the mean of its divisors is an integer number (62388529434).

Almost surely, 2^665477647072 is an apocalyptic number.

It is an amenable number.

665477647072 is an abundant number, since it is smaller than the sum of its proper divisors (831847059344).

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

665477647072 is a wasteful number, since it uses less digits than its factorization.

665477647072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970882370 (or 2970882362 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 61.

The spelling of 665477647072 in words is "six hundred sixty-five billion, four hundred seventy-seven million, six hundred forty-seven thousand, seventy-two".