665355243005 has 8 divisors (see below), whose sum is σ = 824181978624. Its totient is φ = 515113736400.

The previous prime is 665355243001. The next prime is 665355243037. The reversal of 665355243005 is 500342553566.

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

It is not a de Polignac number, because 665355243005 - 2² = 665355243001 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 (665355243001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2146307081 + ... + 2146307390.

It is an arithmetic number, because the mean of its divisors is an integer number (103022747328).

Almost surely, 2^665355243005 is an apocalyptic number.

It is an amenable number.

665355243005 is a deficient number, since it is larger than the sum of its proper divisors (158826735619).

665355243005 is a wasteful number, since it uses less digits than its factorization.

665355243005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292614507.

The product of its (nonzero) digits is 1620000, while the sum is 44.

The spelling of 665355243005 in words is "six hundred sixty-five billion, three hundred fifty-five million, two hundred forty-three thousand, five".