665700843616853 has 8 divisors (see below), whose sum is σ = 733409390268576. Its totient is φ = 599190678322000.

The previous prime is 665700843616789. The next prime is 665700843616927. The reversal of 665700843616853 is 358616348007566.

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

It is a cyclic number.

It is not a de Polignac number, because 665700843616853 - 2⁶ = 665700843616789 is a prime.

It is a super-2 number, since 2×665700843616853² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665700843610853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299595338051 + ... + 299595340272.

It is an arithmetic number, because the mean of its divisors is an integer number (91676173783572).

Almost surely, 2^{665700843616853} is an apocalyptic number.

It is an amenable number.

665700843616853 is a deficient number, since it is larger than the sum of its proper divisors (67708546651723).

665700843616853 is a wasteful number, since it uses less digits than its factorization.

665700843616853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599190678435.

The product of its (nonzero) digits is 522547200, while the sum is 68.

The spelling of 665700843616853 in words is "six hundred sixty-five trillion, seven hundred billion, eight hundred forty-three million, six hundred sixteen thousand, eight hundred fifty-three".