665708519346 has 48 divisors (see below), whose sum is σ = 1481578624512. Its totient is φ = 198225839520.

The previous prime is 665708519293. The next prime is 665708519351. The reversal of 665708519346 is 643915807566.

It is a self number, because there is not a number n which added to its sum of digits gives 665708519346.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4365586 + ... + 4515501.

It is an arithmetic number, because the mean of its divisors is an integer number (30866221344).

Almost surely, 2^665708519346 is an apocalyptic number.

665708519346 is an abundant number, since it is smaller than the sum of its proper divisors (815870105166).

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

665708519346 is a wasteful number, since it uses less digits than its factorization.

665708519346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8881167 (or 8881136 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 665708519346 in words is "six hundred sixty-five billion, seven hundred eight million, five hundred nineteen thousand, three hundred forty-six".