665448663813 has 8 divisors (see below), whose sum is σ = 887982161568. Its totient is φ = 443273804304.

The previous prime is 665448663811. The next prime is 665448663863. The reversal of 665448663813 is 318366844566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665448663813 - 2¹ = 665448663811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665448663811) 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, 89655231 + ... + 89662652.

It is an arithmetic number, because the mean of its divisors is an integer number (110997770196).

Almost surely, 2^665448663813 is an apocalyptic number.

It is an amenable number.

665448663813 is a deficient number, since it is larger than the sum of its proper divisors (222533497755).

665448663813 is a wasteful number, since it uses less digits than its factorization.

665448663813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179319123.

The product of its digits is 59719680, while the sum is 60.

The spelling of 665448663813 in words is "six hundred sixty-five billion, four hundred forty-eight million, six hundred sixty-three thousand, eight hundred thirteen".