665603471236 has 48 divisors (see below), whose sum is σ = 1337811552000. Its totient is φ = 286573105440.

The previous prime is 665603471219. The next prime is 665603471237. The reversal of 665603471236 is 632174306566.

It is a self number, because there is not a number n which added to its sum of digits gives 665603471236.

It is not an unprimeable number, because it can be changed into a prime (665603471237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4897975 + ... + 5032033.

It is an arithmetic number, because the mean of its divisors is an integer number (27871074000).

Almost surely, 2^665603471236 is an apocalyptic number.

It is an amenable number.

665603471236 is an abundant number, since it is smaller than the sum of its proper divisors (672208080764).

665603471236 is a wasteful number, since it uses less digits than its factorization.

665603471236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140032 (or 140030 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 665603471236 in words is "six hundred sixty-five billion, six hundred three million, four hundred seventy-one thousand, two hundred thirty-six".