665241896837 has 48 divisors (see below), whose sum is σ = 815856697344. Its totient is φ = 530780040000.

The previous prime is 665241896831. The next prime is 665241896863. The reversal of 665241896837 is 738698142566.

It is not a de Polignac number, because 665241896837 - 2¹⁴ = 665241880453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665241896831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49449962 + ... + 49463412.

It is an arithmetic number, because the mean of its divisors is an integer number (16997014528).

Almost surely, 2^665241896837 is an apocalyptic number.

It is an amenable number.

665241896837 is a deficient number, since it is larger than the sum of its proper divisors (150614800507).

665241896837 is a wasteful number, since it uses less digits than its factorization.

665241896837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818 (or 13789 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 65.

The spelling of 665241896837 in words is "six hundred sixty-five billion, two hundred forty-one million, eight hundred ninety-six thousand, eight hundred thirty-seven".