665053350566 has 16 divisors (see below), whose sum is σ = 1088335483200. Its totient is φ = 302278543080.

The previous prime is 665053350517. The next prime is 665053350569.

It is a happy number.

665053350566 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665053350569) 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, 549416 + ... + 1277483.

It is an arithmetic number, because the mean of its divisors is an integer number (68020967700).

Almost surely, 2^665053350566 is an apocalyptic number.

665053350566 is a deficient number, since it is larger than the sum of its proper divisors (423282132634).

665053350566 is a wasteful number, since it uses less digits than its factorization.

665053350566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843459.

The product of its (nonzero) digits is 7290000, while the sum is 50.

The spelling of 665053350566 in words is "six hundred sixty-five billion, fifty-three million, three hundred fifty thousand, five hundred sixty-six".