665382648803 has 4 divisors (see below), whose sum is σ = 686846605248. Its totient is φ = 643918692360.

The previous prime is 665382648779. The next prime is 665382648869. The reversal of 665382648803 is 308846283566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308846283566 = 2 ⋅154423141783.

It is a cyclic number.

It is not a de Polignac number, because 665382648803 - 2⁶ = 665382648739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665382648503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10731978176 + ... + 10731978237.

It is an arithmetic number, because the mean of its divisors is an integer number (171711651312).

Almost surely, 2^665382648803 is an apocalyptic number.

665382648803 is a deficient number, since it is larger than the sum of its proper divisors (21463956445).

665382648803 is a wasteful number, since it uses less digits than its factorization.

665382648803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21463956444.

The product of its (nonzero) digits is 39813120, while the sum is 59.

The spelling of 665382648803 in words is "six hundred sixty-five billion, three hundred eighty-two million, six hundred forty-eight thousand, eight hundred three".