668027843685 has 24 divisors (see below), whose sum is σ = 1157983107840. Its totient is φ = 356260538592.

The previous prime is 668027843683. The next prime is 668027843689. The reversal of 668027843685 is 586348720866.

It is not a de Polignac number, because 668027843685 - 2¹ = 668027843683 is a prime.

It is a super-2 number, since 2×668027843685² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668027843683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351336 + ... + 1208094.

It is an arithmetic number, because the mean of its divisors is an integer number (48249296160).

Almost surely, 2^668027843685 is an apocalyptic number.

It is an amenable number.

668027843685 is a deficient number, since it is larger than the sum of its proper divisors (489955264155).

668027843685 is a wasteful number, since it uses less digits than its factorization.

668027843685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874097 (or 874094 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 668027843685 in words is "six hundred sixty-eight billion, twenty-seven million, eight hundred forty-three thousand, six hundred eighty-five".